On March 31, Taiwan’s Ministry of Foreign Affairs reported that two Chinese Air Force (PLAAF) J-11 jets crossed the median line of the Taiwan Strait. This violated the long-held tacit agreement between China and Taiwan that neither side should cross the median line.

Taiwan deemed this “an intentional, reckless & provocative action,” which triggered “a 10-minute standoff” in the air. As Asia security expert Bonnie S. Glaser notes that, if intentional, this would be the first PLAAF crossing of the median line in about 20 years. In this case, it’s likely that Taiwan, not the South China Sea, prompted Beijing’s actions.

An unresolved issue from the Chinese civil war, Taiwan has always been a “core interest” to party leaders in Beijing. Here are some key takeaways from my research on China-Taiwan relations…

Read the full article in The Washington Post.

To hear more from Ketian, don't miss her recently posted video Q&A. In addition, be sure to RSVP for her April 16 seminar "Killing the Chicken to Scare the Monkey: Explaining Coercion by China in the South China Sea."

This article originally appeared at Brookings.

March 18 marks the fifth anniversary of Russia’s illegal annexation of Crimea, which capped the most blatant land grab in Europe since World War II. While the simmering conflict in Donbas now dominates the headlines, it is possible to see a path to resolution there. It is much more difficult with Crimea, which will remain a problem between Kyiv and Moscow, and between the West and Russia, for years—if not decades—to come.

THE TAKING OF CRIMEA

In late February 2014, just days after the end of the Maidan Revolution and Victor Yanukovych’s flight from Kyiv, “little green men”—a term coined by Ukrainians—began seizing key facilities on the Crimean peninsula. The little green men were clearly professional soldiers by their bearing, carried Russian weapons, and wore Russian combat fatigues, but they had no identifying insignia. Vladimir Putin originally denied they were Russian soldiers; that April, he confirmed they were.

By early March, the Russian military had control of Crimea. Crimean authorities then proposed a referendum, which was held on March 16. It proved an illegitimate sham. To begin with, the referendum was illegal under Ukrainian law. Moreover, it offered voters two choices: to join Russia, or to restore Crimea’s 1992 constitution, which would have entailed significantly greater autonomy from Kyiv. Those on the peninsula who favored Crimea remaining a part of Ukraine under the current constitutional arrangements found no box to check.

The referendum unsurprisingly produced a Soviet-style result: 97 percent allegedly voted to join Russia with a turnout of 83 percent. A true referendum, fairly conducted, might have shown a significant number of Crimean voters in favor of joining Russia. Some 60 percent were ethnic Russians, and many might have concluded their economic situation would be better as a part Russia.

It was not, however, a fair referendum. It was conducted in polling places under armed guard, with no credible international observers, and with Russian journalists reporting that they had been allowed to vote. Two months later, a member of Putin’s Human Rights Council let slip that turnout had been more like 30 percent, with only half voting to join Russia.

Regardless, Moscow wasted no time. Crimean and Russian officials signed a “treaty of accession” just two days later, on March 18. Spurred by a fiery Putin speech, ratification by Russia’s rubberstamp Federation Assembly and Federation Council was finished by March 21.

ATTEMPTS TO JUSTIFY

Moscow’s actions violated the agreement among the post-Soviet states in 1991 to accept the then-existing republic borders. Those actions also violated commitments to respect Ukraine’s sovereignty, territorial integrity, and independence that Russia made in the 1994 Budapest Memorandum on Security Assurances for Ukraine and 1997 Ukrainian-Russian Treaty of Friendship, Cooperation and Partnership.

In late March 2014, Russia had to use its veto to block a U.N. Security Council resolution that, among other things, expressed support for Ukraine’s territorial integrity (there were 13 yes votes and one abstention). The Russians could not, however, veto a resolution in the U.N. General Assembly. It passed 100-11, affirming Ukraine’s territorial integrity and terming the Crimean referendum invalid.

Russian officials sought to justify the referendum as an act of self-determination. It was not an easy argument for the Kremlin to make, given the history of the two bloody wars that Russia waged in the 1990s and early 2000s to prevent Chechnya from exercising a right of self-determination.

Russian officials also cited Western recognition of Kosovo as justification. But that did not provide a particularly good model. Serbia subjected hundreds of thousands of Kosovar Albanians to ethnic-cleansing in 1999; by contrast, no ethnic-cleansing occurred in Crimea. Kosovo negotiated with Serbia to reach an amicable separation for years before declaring independence unilaterally. There were no negotiations with Kyiv over Crimea’s fate, and it took less than a month from the appearance of the little green men to Crimea’s annexation.

The military seizure of Crimea provoked a storm of criticism. The United States and European Union applied visa and financial sanctions, as well as prohibited their ships and aircraft from traveling to Crimea without Ukrainian permission. Those sanctions were minor, however, compared to those applied on Russia after it launched a proxy conflict in Donbas in April 2014, and particularly after a Russian-provided surface-to-air missile downed a Malaysian Air airliner carrying some 300 passengers.

Whereas Ukrainian forces on Crimea did not resist the Russian invasion (in part at the urging of the West), Kyiv resisted the appearance of little green men in Donbas. Before long, the Ukrainians found themselves fighting Russian troops as well as “separatist” forces. That conflict is now about to enter its sixth year.

Finding a settlement in Donbas has taken higher priority over resolving the status of Crimea—understandable given that some 13,000 have died and two million been displaced in the fighting in eastern Ukraine. Moscow seems to see the simmering conflict as a useful means to pressure and distract Kyiv, both to make instituting domestic reform more difficult and to hinder the deepening of ties between Ukraine and Europe.

Resolving the Donbas conflict will not prove easy. For example, the Kremlin may not be prepared to settle until it has some idea of where Ukraine fits in the broader European order, that is, its relationship with the European Union and NATO. But Russia has expressed no interest in annexing Donbas. While the seizure of Crimea proved very popular with the broader Russia public, the quagmire in Donbas has not. The most biting Western economic sanctions would come off of Russia if it left Donbas. At some point, the Kremlin may calculate that the costs outweigh the benefits and consent to a settlement that would allow restoration of Ukrainian sovereignty there.

Moscow will not, on the other hand, willingly give up Crimea. Russians assert a historical claim to the peninsula; Catherine the Great annexed the peninsula in 1783 following a war between Russia and the Ottoman Empire. (That said, Crimea was transferred from the Russian Soviet Federative Socialist Republic to the Ukrainian Soviet Socialist Republic in 1954, and, as noted above, the republics that emerged from the wreckage of the Soviet Union in 1991 agreed to accept the borders as then drawn.)

Retaining Crimea is especially important to Putin, who can offer the Russian people no real prospect of anything other than a stagnant economy and thus plays the nationalism and Russia-as-a-great-power cards. He gained a significant boost in public popularity (much of which has now dissipated) from the rapid and relatively bloodless takeover of the peninsula. Moreover, it offers a vehicle for Russia to maintain a festering border dispute with Ukraine, which the Kremlin may see as discouraging NATO members from getting too close to Ukraine.

Kyiv at present lacks the political, economic, and military leverage to force a return. Perhaps the most plausible route would require that Ukraine get its economic act together, dramatically rein in corruption, draw in large amounts of foreign investment, and realize its full economic potential, and then let the people in Crimea—who have seen no dramatic economic boom after becoming part of Russia—conclude that their economic lot would be better off back as a part of Ukraine.

For the West, Russia’s seizure and annexation of Crimea pose a fundamental challenge to the European order and the norms established by the 1975 Helsinki Final Act. The United States and Europe should continue their policy of non-recognition of Crimea’s illegal incorporation. They should also maintain Crimea-related sanctions on Russia, if for no other reason than to signal that such land grabs have no place in 21st-century Europe.

This article originally appeared at Radio Free Europe/Gandhara.

Political scientist Asfandyar Mir has studied security affairs in South Asia for years. Now a postdoctoral fellow at the Center for International Security and Cooperation at Stanford University, Mir explains the latest developments, old conflicts, and potential conflagrations in the ongoing crisis between nuclear-armed rivals India and Pakistan.

RFE/RL: Where do you see the military situation moving after India and Pakistan engaged in what appears to be retaliatory air strikes and cross-border shelling?

Asfandyar Mir: The current stand-off between India and Pakistan hasn't fully de-escalated, but it isn't as tense as it was some days ago. After Pakistan retaliated with air strikes against India on February 27, the crisis intensified -- it appeared the Indian government was considering a follow-on retaliation. In that backdrop, Pakistani Prime Minister Imran Khan's gesture of returning the Indian Air Force pilot, captured by Pakistan after his plane was shot down, lowered the political temperature, eased the situation somewhat. That said, military forces on both sides remain mobilized in large numbers, and the Indian government still hasn’t given a clear-cut signal of wanting to de-escalate.

RFE/RL: Do you see the current leadership in India and Pakistan as capable of deescalating given the domestic pressures they currently face?

Mir: The leadership of the two countries has different political incentives. On the Indian side, Prime Minister [Narendra] Modi still has incentives to re-escalate. He is going into a national election. His government’s economic performance has been weak, so he appears to be relying more on foreign policy issues like confronting Pakistan -- an issue the Indian electorate cares about. Pakistan’s shooting down of the Indian aircraft and capturing of the air force pilot also deeply embarrassed him and his political party, the Bhartiya Janata Party (BJP).

On the Pakistan side, two leaders matter: Prime Minister Imran Khan and chief of the country's powerful army, General Qamar Bajwa. After the first Indian military raid, both were left embarrassed before their key domestic audiences: Khan in front of his voter base and Bajwa in front of his officer corps.

However, Pakistan's retaliatory strikes not only reversed that damage but enhanced their domestic political standing. Now both the leaders want a deescalation. Khan has made his first move to deescalate. He is also insisting with a dialogue offer to India on terrorism on India's terms. What he hasn’t done and could do to defuse the situation is a crackdown against the group behind the February 14 terror attack, Jaish-e-Muhammed.

Khan, however, would need Bajwa’s support for such a crackdown. It remains unclear whether Bajwa would agree. The Pakistani military hasn’t acted against Pakistan-based jihadis operating in Kashmir. Instead, it has seen them as valuable allies in confronting India in Kashmir.

RFE/RL: What happens to the Kashmir issue now?

Mir: We remain very far from any meaningful progress on the dispute over Kashmir. In recent years, India has intensified its crackdown in Kashmir against violent and non-violent separatist groups. India also employs a heavy-handed counterinsurgency strategy, which frequently targets the civilian population. As a result, resentment in the Kashmiri population toward the Indian state remains very high. The Indian government continues to see a coercive approach instead of a political approach involving concessions as the way forward in the disputed region.

Pakistan also remains firm in its territorial claim over Kashmir. Given India’s unwillingness to make concessions and the deep alienation in the region toward the Indian state, Pakistan is likely to continue political and military support for the insurgency in Kashmir.

RFE/RL: What dangers do jihadi groups present to Pakistan?

Mir: It is commonly assumed that jihadi groups operating against India in Kashmir pose a direct threat to Pakistan. This was true a decade ago, when factions of Kashmir-focused jihadi groups defected toward transnational jihadis like Al-Qaeda. It appears that the process has stopped. Major Kashmir-focused jihadi groups based in Pakistan do not challenge the Pakistani government. These groups have also consolidated control over their cadres, preventing fragmentation toward Al-Qaeda and [the ultra-radical] Islamic State (IS).

This is not to say there are no indirect bad effects of such groups on Pakistan. These groups spawn a large jihadi infrastructure, which is a source of radicalization in the country. Pakistan continually faces international opprobrium, even from its allies like China privately, for allowing such groups to operate from its territory.

RFE/RL: What has the international community's role been in the current crisis?

Mir: [U.S.] President [Donald] Trump made an important statement in Hanoi on February 28, suggesting that the U.S. government has been involved in mediating an end to the India-Pakistan crisis. Besides the U.S., Saudi Arabia, the United Arab Emirates, China, and Russia have sought to deescalate the tensions.

Overall, Pakistan is under pressure from the international community for not doing enough to curb anti-India jihadi groups. Still, it is striking that beyond condemnation, the U.S. and other major powers have not pledged any material support to the Indian government like sanctions against Pakistani leadership or military support for Indian operations.

RFE/RL: Did nuclear weapons play a role in the current crisis?

Mir: Nuclear weapons have played a role. Following the first Indian air strike on February 26, the Pakistani military spokesman stated that the government was activating the body which decides the deployment and use of nuclear weapons. This was a clear-cut signal by Pakistan that it would use nuclear weapons if the crisis exacerbated. I believe that deterred a sizable Indian response after Pakistan conducted its retaliatory strikes on February 27.

This piece originally appeared at Brookings.

On November 25, Russian border patrol ships attacked and seized three Ukrainian naval vessels attempting to transit from the Black Sea to the Sea of Azov via the Kerch Strait. That violated both maritime law and a 2003 Ukraine-Russia agreement that governs passage through the strait.

The attack foreshadows a Russian bid to establish unilateral control over the Kerch Strait and perhaps blockade Ukrainian ports on the Sea of Azov. Unfortunately, the United States and Europe have reacted weakly, largely limiting their responses to expressions of concern. The West should make clear that Russia will face concrete consequences if it does not release the Ukrainian naval vessels and crews and allow Ukraine free passage through the strait.

WHAT HAPPENED?

On the morning of November 25, three Ukrainian naval vessels—a tug and two small gunboats—approached the southern entrance to the Kerch Strait. After transiting the Black Sea from Odesa, they sought to pass through the strait to a Ukrainian port on the Sea of Azov, following a course taken by two other Ukrainian gunboats in September. Although they were military vessels, the Ukrainian ships had a right of innocent passage. Moreover, a 2003 agreement between Ukraine and Russia states that Ukrainian- and Russian-flagged ships, both merchant ships and state non-commercial vessels, have a right to free navigation in the Strait of Kerch and Sea of Azov, which the sides consider the internal waters of Ukraine and Russia.

While Ukrainian and Russian accounts differ as to some details of what happened, their stories coincide on key points. Russian border patrol vessels intercepted the three Ukrainian ships in the southern approach to the strait, and the Russian vessel Don rammed the Ukrainian tug Yani Kapu. Video and audio from the Don make clear the Don’s intention to ram.

The Ukrainians say the Russian vessels sought to ram the Berdyansk and Nikipol gunboats as well, but the smaller, more agile Ukrainian ships successfully maneuvered out of the way (Russian aerial photos show the sides’ ships circling and maneuvering). In the process, it appears that the Russian vessel Izumrud rammed, or was rammed by, another Russian ship, possibly the Don.

The three Ukrainian ships then maintained station for much of the day in Russian-controlled waters at the south entrance to the Kerch Strait. In the meantime, the Russians physically blocked the main passage through the strait, positioning a tanker under the central span of the Kerch bridge.

That evening, apparently having concluded that they would not be allowed passage into the Sea of Azov, the Ukrainian vessels turned south toward the Black Sea, exiting the approach to the strait. Russian border patrol vessels intercepted the Ukrainian ships, ordered them to halt and then opened fire, wounding several Ukrainian crewmen. The Russians boarded and seized the Ukrainian vessels. Crucially, as Bellingcat has showed, Ukrainian and Russian data agree that the attack took place in the Black Sea more than 12 nautical miles off the coast of Russian-occupied Crimea—that is, in international waters. The Russian action is indefensible, particularly as the Ukrainian ships clearly were heading away from the Kerch Strait when attacked.

WHAT’S AT ISSUE?

Since seizing Crimea in 2014, the Russians have moved to tighten control over the Sea of Azov. The bridge they built to link the city of Kerch in Crimea to the Taman peninsula on the Russian mainland prevents the passage of larger ships that used to call at the Ukrainian port of Mariupol on the Sea of Azov. Mariupol is Ukraine’s third busiest port, exporting steel, iron and grain. Over the past nine months, the Ukrainians have complained that Russian patrol boats have stopped, boarded and/or harassed commercial vessels bound for Ukrainian ports on the Sea of Azov as well as Ukrainian fishing boats.

Russia seems to be trying to establish unilateral control over passage through the Kerch Strait and the Sea of Azov. The Ukrainians fear that Russia will impose an economic blockade on Ukrainian ports in a bid to up the economic pressure on Kyiv. During the week of November 26, the Ukrainians reported that ships bound for Ukrainian ports on the Sea of Azov were not being permitted passage through the Kerch Strait.

THE WEST IS CONCERNED

Late on November 25, the European Union and NATO called on Russia to ensure unhindered passage for Ukrainian ships into the Sea of Azov. Officials of various Western countries began speaking up the next day, indicating various degrees of concern. With thanks to @sovietsergey, we learned that:

• The Slovenian, Romanian, and Finnish foreign ministries and Swedish foreign minister were “deeply concerned.”
• The Austrian foreign minister was “seriously concerned.”
• The Dutch foreign minister was “severely concerned.”
• The Czech foreign ministry was “highly concerned.”
• The French foreign ministry was “profoundly concerned.”
• The G-7 foreign ministers expressed “utmost concern.”

Some went further. The Lithuanian foreign ministry, Canadian foreign minister, and EU president “condemned” the Russian action, while the British foreign secretary “utterly condemned” it.

Washington had nothing to say on the 25th. The next day, Ambassador to the U.N. Nikki Haley and Secretary of State Mike Pompeo made strong statements, but President Donald Trump almost immediately undercut them when he seemed to take a neutral position. National Security Advisor John Bolton did not help on November 27 when spelling out topics for the planned Trump meeting with Russian President Vladimir Putin on the margins of the G-20 summit; he had to be prompted to put Ukraine on the list.

In an interview that same day, Trump suggested he might cancel the meeting with Putin. On November 28, however, U.S. and Russian officials indicated that the meeting was on, which the president reaffirmed the morning of November 29 before heading to Andrews Air Force Base. Then, from Air Force One en route to Argentina, he tweeted that the meeting was off, citing Russia’s seizure of the Ukrainian ships and sailors (most thought the more likely reason was that morning’s news of the guilty plea by his former lawyer and reports about his company’s efforts to build a Trump Tower in Moscow).

Nothing suggests that these expressions of concern and condemnation, or Trump’s on again/off again handling of his meeting with Putin, caused anxiety in the Kremlin. Putin in Argentina brushed off the complaints of his Western counterparts. One week after the attack, the Yani Kapu, Berdyansk, and Nikipol remain impounded at a Russian facility in Kerch, the ships’ crews sit in Lefortovo Prison in Moscow, and Russia continues to harass ships traveling to Ukrainian

THE WEST SHOULD GET SERIOUS

Russia’s November 25 attack on the Ukrainian ships was a test of Kyiv’s reaction. It was also a test of how the West would respond. Unfortunately, the West is failing miserably. If the United States and Europe do not wish to see Russia solidify its control over the Sea of Azov and blockade Ukraine’s ports, they have to make clear to Moscow that there will be consequences.

The West could consider military steps such as increasing the tempo of visits by NATO warships to the Black Sea (that tempo has already increased since Russia’s seizure of Crimea). The presence of NATO warships, particularly U.S. Navy vessels capable of carrying sea-launched cruise missiles, clearly irks the Kremlin.

Some have suggested that NATO send warships into the Sea of Azov. That would not prove wise. First, it could well provoke a shooting conflict in a region where Russia has geographic advantages. Second, it would violate the 2003 agreement, which requires the approval of both Ukraine and Russia for third-country naval vessels to enter the Sea of Azov. The West should not take actions that would delegitimize that agreement, as it is critical to Ukraine’s claim for open access through the Kerch Strait.

The United States and other NATO countries, on a national basis, might weigh what additional military assistance would be appropriate for Ukraine in view of Russia’s latest military escalation.

The United States and European Union should consider additional economic sanctions on Russia. They could draw on the following list of examples:

• Prohibit U.S. and EU member state-flagged ships from calling on Russian ports on the Sea of Azov and Black Sea.
• Prohibit ships with cargos from Russian ports in the Sea of Azov and Black Sea from entering American and European ports. (Annegret Kramp-Karrenbauer, a close political ally of German Chancellor Angela Merkel and candidate to succeed her as head of Germany’s Christian Democratic Union, has already suggested closing European ports to ships from Russian ports on the Sea of Azov.)
• Target Russian state-owned banks or parastatal companies for specific sanctions. (In April, when the U.S. government announced sanctions on United Company Rusal, a large Russian-based aluminum producer, the company’s stock plunged by 50 percent, while the Moscow stock exchange’s index lost 8 percent. The Treasury Department subsequently eased the sanctions, but the case demonstrates that the West can inflict significant economic impacts on Russian entities.)
• Suspend work on the Nord Stream II pipeline. The pipeline project is dubious as a commercial project. Refurbishing the existing pipeline network that transits gas through Ukraine would be less expensive, but Moscow wishes to end the transit fees it pays Kyiv and have the ability to totally shut off gas into that pipeline network.

The Kremlin tries to put on a brave face about sanctions, but they do cause economic pain, particularly for a stagnant Russian economy that is growing at less than 2 percent per year. Making Moscow understand that unacceptable actions will have growing costs is key to changing calculations in the Kremlin.

This situation cries out for leadership from Washington, and it would behoove the Trump administration to act. First, it could coordinate with European allies on sanctions that would have broad impact and signal trans-Atlantic unity in the face of Russia’s unacceptable actions. Second, administration action would forestall new congressional sanctions, which likely would be less finely targeted and more difficult to remove if/when Russia corrected its misbehavior.

If the West takes no action, it should get used to Moscow treating the Sea of Azov as a virtual Russian lake. And it should think what next steps an emboldened Moscow will attempt in its conflict with Ukraine and hybrid campaign against the West.