This piece originally appeared in The National Interest.

Significant progress has been made in improving the defense situation in the Baltic states since 2014, but NATO can take some relatively modest steps to further enhance its deterrence and defense posture in the region, according to a report by Michael O’Hanlon and Christopher Skaluba, which was based on an Atlantic Council study visit to Lithuania. The Atlantic Council was kind enough to include me on the trek, which began in Lithuania’s capital, Vilnius, and included visits to troops in the field and the port of Klaipeda. I largely concur with Mike and Chris’s comments and supplement them below with several additional observations.

First, one can understand the preoccupation of Lithuania’s senior political and military leadership with the country’s security situation. Lithuania has had a difficult history with the Soviet Union and Russia. Some in Vilnius believe that Moscow regards the Baltic states as “temporarily lost territory.”

A Russian military invasion of the Baltic states is not a high probability. However, the Lithuanians cannot ignore a small probability, especially in light of the Kremlin’s recent rhetoric, the Russian military’s ongoing modernization of its conventional forces and exercise pattern of the past five years, and Russia’s use of military force to seize Crimea and conduct a conflict in Donbas.

When the Lithuanian Ministry of National Defense (MNOD) looks around its neighborhood, it can see specific reasons for concern. Russia is upgrading its military presence in the Kaliningrad exclave on Lithuania’s southwestern border. The MNOD now counts Kaliningrad as hosting some twenty thousand Russian military personnel, including a naval infantry unit and substantial anti-access, area denial capabilities, such as advanced surface-to-air missiles. The Lithuanians assess that the Russian military could mount a large ground attack from Belarus, to the east of Lithuania (the border is less than twenty miles from downtown Vilnius). These forces are backed by an additional 120,000 personnel in Russia’s Western Military District, including a tank army. Russia has substantial air assets in the region as well as warships in the Baltic Sea.

For its part, Lithuania can muster fourteen thousand soldiers and sailors (four thousand of whom are conscripts serving just nine months). They are backed up by five thousand volunteers, similar to the U.S. National Guard. Under NATO’s enhanced forward presence program, a German-led NATO battlegroup adds 1,300 troops, mainly from Germany, the Netherlands and the Czech Republic. In addition, NATO member air forces rotate small fighter squadrons into Lithuania to provide air policing for the Baltic states.

Second, Lithuania has a logical plan to enhance its defense capabilities. The MNOD is making good use of its defense dollars (Lithuania now meets NATO’s two percent of gross domestic product goal, having tripled its defense expenditures over the past six years). Eschewing shiny objects such as F-16 jets, the MNOD focuses on upgrading the capabilities of its two primary ground units, a mechanized brigade and a recently-established motorized brigade. The main procurement programs of the past three years have purchased infantry fighting vehicles, self propelled artillery and short-range surface-to-air missiles to equip the brigades.

In the event of war, the forces in Lithuania would likely fight a defensive holding action while awaiting NATO reinforcements. The MNOD and Ministry of Transport are working together to enhance the country’s ability to flow in NATO forces, including by upgrading the rollon/roll-off capacity at the port of Klaipeda and building a European standard gauge railroad line from Poland to the main base of Lithuania’s mechanized brigade. The railroad line, which o obviates the need to change the railroad gauge at the Polish-Lithuanian border, a cumbersome process involving changing out the wheels of railcars, ultimately will be extended north to Latvia and Estonia.

Third, the Lithuanians value NATO’s enhanced forward presence in the form of the NATO battlegroup. The battlegroup is fully integrated into Lithuania’s Iron Wolf Brigade, and in wartime would come under the tactical control of the brigade. The rotational NATO force is based with and trains side-by-side with major elements of that brigade.

One potential question is, if Russian forces were to cross the border and the Iron Wolf Brigade deployed, then how quickly would the NATO battlegroup take the field with it? The latter would need a NATO command to do so, and likely also national authorizations from Berlin, The Hague and Prague. Hopefully, those authorizations would be transmitted early as a crisis developed so that the NATO battlegroup could deploy immediately. It adds significantly to Lithuanian combat capabilities, including by providing the only armor unit in the country.

Fourth, as pleased as Vilnius is to have a NATO military presence, the Lithuanians very much would like to add a U.S. component to it. With a U.S. armored brigade combat team deployed in Poland on a rotational basis, the U.S. military has the assets to consider periodically rotating an armored company to Lithuania (and to Latvia and Estonia). These rotations would be useful military exercises in case there is a crisis that requires a reinforcement move from Poland to Lithuania through the Suwalki Gap.

Lithuania is moving in the right direction in bolstering its defense capabilities, with prudent steps taken over the past six years and sensible plans for the future. As Mike and Chris point out, modest steps by NATO and, I would argue, the United States could significantly add to the Alliance’s deterrence and defense posture in the Baltics.

This article originally appeared at Brookings.

Ukrainian President Volodymyr Zelenskiy visited Brussels on June 4 and 5, where he met with the leadership of the European Union and NATO. He reaffirmed Kyiv’s goal of integrating into both institutions—goals enshrined earlier this year as strategic objectives in Ukraine’s constitution.

At their April meeting to mark NATO’s 70th anniversary, NATO foreign ministers noted their commitment to the alliance’s “open door” policy for countries that aspire to membership. Russian aggression over the past five years has only solidified domestic support within Ukraine for membership, though the path to achieving that objective faces serious obstacles.

GROWING SUPPORT FOR NATO IN UKRAINE

When NATO leaders in July 1997 invited Poland, the Czech Republic, and Hungary to join the alliance, they also stated the “open door” policy. That reaffirmed Article 10 of the Washington Treaty that established NATO, which reads in part: “The Parties may, by unanimous agreement, invite any other European state in a position to further the principles of this Treaty and to contribute to the security of the North Atlantic area to accede to this Treaty.”

President Leonid Kuchma publicly declared Ukraine’s interest in NATO membership in May 2002. Washington expressed support while noting that Kyiv had to do its homework, that is, it had to adopt the kinds of democratic, economic, and military reforms that the alliance asked of other aspirants. During the remainder of Kuchma’s time in office, however, Ukraine made little tangible progress in those areas.

In 2006, President Victor Yushchenko attached high priority to securing a NATO membership action plan (MAP). By summer, Kyiv looked on course to attain a MAP when alliance foreign ministers met that December. Curiously, Moscow did not come out hard against the idea. The prospective MAP derailed, however, after Yushchenko appointed Victor Yanukovych as prime minister. During a September visit to Brussels, Yanukovych said he did not want a MAP. The proposal died given the divided position of Ukraine’s executive branch.

Yushchenko called for a MAP again in January 2008, this time with the support of Prime Minister Yuliya Tymoshenko and Rada (parliament) Speaker Arseniy Yatseniuk. Moscow came out in full opposition. When Yushchenko visited the Russian capital that February, he had to stand alongside and listen to President Vladimir Putin threaten to target nuclear missiles on Ukraine. Instead of lobbying allies to support a MAP for Kyiv, Washington waited until the April Bucharest summit, where President George W. Bush attempted to persuade his counterparts to grant Ukraine (and Georgia) a MAP. However, a number of allied leaders by then had made up their minds and opposed the idea. Concern about Russian opposition undoubtedly played a role.

When Yanukovych became president in early 2010, he reiterated his lack of interest in NATO membership, and the issue went dormant. That changed after the 2014 Maidan Revolution, Yanukovych’s flight to Russia, Russia’s use of military force to seize Crimea, and Russian aggression in the eastern region of Donbas. President Petro Poroshenko increasingly stressed the importance of Ukraine joining the alliance.

In February 2019, the Rada overwhelmingly approved an amendment to the constitution that fixed membership in the European Union and NATO as strategic goals for Ukraine. While opinion polls prior to 2014 showed, at best, lukewarm public support for NATO membership, that has shifted with the continuing fighting in Donbas. Polls over the past four years have shown pluralities—in some cases, even a majority—favoring joining the alliance. For example, a January 2019 survey had 46 percent in favor as opposed to 32 percent against.

President Zelenskiy, who assumed office on May 20, also expresses support for NATO membership. In Brussels he stated that he would continue Kyiv’s “strategic course to achieve full-fledged membership in the EU and NATO.”

THE ELEPHANT IN THE ROOM: RUSSIA

Ukraine still has much to do to meet the criteria for NATO membership. MAPs are intended to serve as guides for prospective members to fulfill those criteria. Objectively, Ukraine is as far along as countries that received MAPs in 1999. What has blocked Ukraine’s MAP ambition is Russia and the deference that some NATO members give to Moscow’s views.

Another reason for the alliance’s reluctance to grant a MAP is that MAPs do not convey an Article 5 security guarantee. (Article 5, the heart of the NATO treaty, provides that an attack against one member will be considered as an attack against all.) NATO lacks a good response to the question: What does the alliance do if an aspirant receives a MAP and then—before it becomes a full member—comes under attack?

The Kremlin clearly wants to return Ukraine to Russia’s orbit, though its actions over the past five years have had the opposite effect. Russia’s illegal annexation of Crimea and its ongoing aggression in Donbas, which has taken more than 13,000 lives, have persuaded Ukraine’s political elite and much of its population of the need to anchor Ukraine solidly in European and trans-Atlantic institutions and reduce relations with Moscow.

If the Kremlin cannot return Ukraine to its orbit, Plan B apparently is to break it. That would explain Russia’s hybrid war and economic sanctions against Kyiv as well as continued fueling of the fighting in Donbas. Moscow aims to pressure, distract, and destabilize the Ukrainian government in order to hinder its efforts to adopt a full set of reforms that would spur economic growth; to frustrate Ukraine’s ability to implement the provisions of the Ukraine-EU association agreement; and to make Ukraine appear an unattractive partner for the West.

Russia pursues this course despite its professed adherence to the principles of the 1975 Helsinki Final Act. Those principles include “the right to belong or not to belong to international organizations, to be or not to be party to bilateral or multilateral treaties including the right to be or not to be a party to treaties of alliance.” Moscow plainly does not want to allow Kyiv the right to choose whether or not to be a party to NATO.

Moscow plainly does not want to allow Kyiv the right to choose whether or not to be a party to NATO.

The Kremlin’s backing away from this (and other principles) of the Helsinki Final Act reflects a conclusion in Moscow that the post-Cold War European security order has evolved in ways that disadvantage Russia’s interests. The Russian leadership thus has set out to disrupt that order (Crimea has its antecedents in Transnistria, South Ossetia, and Abkhazia). Russian officials may well have taken note of NATO’s September 1995 study of the how and why of enlargement. That study said: “Resolution of [ethnic disputes or external territorial disputes] would be a factor in determining whether to invite a state to join the Alliance.” The Kremlin has sought to create territorial disputes in the post-Soviet space, and some NATO members fear that giving Ukraine membership now would confront the alliance with an immediate Article 5 contingency against Russia.

It may well be that Moscow requires some idea of what a future European security order might look like, including the relationship between Ukraine and NATO, before it moves to resolve the conflict in Donbas. At this point, however, it does not appear that any Track I channels are discussing that question. Nothing suggests that it has come up in the Normandy configuration involving officials from Ukraine, Russia, Germany, and France.

This is an extraordinarily difficult question. In thinking about a European security order, how can one reconcile the view of Kyiv—and of most of the West—that Ukraine, a sovereign and independent state, should have the right to choose its own foreign policy course, with Russia’s demand for a sphere of influence that includes Ukraine?

Some have offered solutions to this dilemma. My Brookings colleague, Michael O’Hanlon, has proposed establishing a zone of permanently neutral states running from Sweden and Finland in the north down to the Black Sea and the Caucasus, with their security guaranteed by both NATO and Russia. Russia would withdraw its forces from Georgia, Ukraine, and Moldova, and the West would lift economic sanctions on Russia. NATO would abandon further enlargement, though states in the neutral zone could join the European Union.

This is an interesting “outside-the-box” idea, but it would not work. Many of those states (not just Ukraine and Georgia, but also Sweden and Finland) would not agree to be consigned to such a zone. And Moscow opposes EU membership for post-Soviet states; the Russians pressed Yanukovych not to sign the association agreement with the European Union when he had made clear his lack of interest in deepening relations with NATO.

The best idea that I have been able to come up with is that Ukraine, Russia, and NATO agree that Ukrainian membership in the alliance is a matter of not now, but not never. That would likely please neither Kyiv nor Moscow, but it could offer a way to kick a difficult can down the road.

NATO membership for Ukraine is unlikely in the near term. For the foreseeable future, Ukraine should continue to deepen its practical cooperation with the alliance. Much, if not all, of a MAP can be put into Kyiv’s annual action plans. Moscow’s principal objection appears to be to the name of the plan, not the content. The focus then should be on implementation. Ukraine should seek to prepare itself as much as possible—not just in terms of defense and security reforms, but also in solidifying its embrace of the democratic and market economy values of the alliance. That will put Ukraine in position to take advantage if/when an opportunity emerges and NATO is ready to consider membership.

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.