In exceptional situations, EU states manage to think together, but only for the short term. And in extremely rare cases, they manage to think together and for the long term—like now, on Ukraine. That’s when strategy becomes possible.

The EU’s position in managing the Ukraine crisis is weak. A military solution is unthinkable and impossible. Both big and small European states are dependent on Russian energy supplies or benefit greatly from Russian money in their financial institutions. Fears of war and a lack of confidence make people susceptible to a spirit of appeasement. Considerable portions of Western political elites and publics alike understand or openly sympathize with the Russian cause. Many people ask what business the West has in Ukraine in the first place.

Against this backdrop, it is immensely difficult to formulate a cohesive foreign policy position. It is even more difficult to create one that is robust and that will last longer than it takes to read it out.

Given these odds, the EU’s performance since the Ukraine crisis went hot in early March has been relatively good. The EU created a common position, engaged in intensive diplomacy with Russia, and backed up its demands with a three-step sanctions regime. It then implemented two of these steps, dedicated significant relief funds to avoid Ukraine going bankrupt, and even managed to keep all 28 member states in support of these measures.

How did the EU achieve this cohesion? The answer lies in the fact that the gravity of the situation led enough member states to recalibrate their cost-benefit calculations.

Of course, nobody wanted to lose valuable Russian business. Those states with good diplomatic relations with Moscow were not eager to put them at risk. And yet it became clear to all 28 that the predictable short-term losses incurred by tougher sanctions were much smaller than the potential long-term costs of a changed Eurasian security landscape.

In essence, the EU’s unity on Ukraine was not a triumph of values over interests, as some observers have claimed. It was a victory for long-term over short-term thinking.

Nowhere was this long-term perspective clearer than in Germany. It became obvious that a qualitatively new type of policy was emerging when Angela Merkel, in language hitherto unheard from the famously cautious German chancellor, declared that Germany could tolerate the costs that EU sanctions against Moscow would likely inflict on the country’s own economy.

That message was not only aimed at Russian President Vladimir Putin and his allies in Russia’s state-owned companies. Merkel’s words were also targeted just as directly toward the German business community, an influential and well-organized pro-Russian bunch that had dutifully warned against taking a tougher stance on the Kremlin.

Observers rubbed their eyes. Merkel had made the switch. Where once short-term interests had reigned supreme, long-term considerations now informed decisionmaking. That was an enormously important sign for the rest of the EU. France and Britain, equally reluctant to annoy Putin, came on board. So did some smaller states in southeast Europe that are even more dependent on Russia.

No one knows how long the EU’s unity on Ukraine can last, or whether it will crumble the moment the EU has to consider imposing the third step of its sanctions plan, which would entail serious economic and financial measures potentially harmful to Europeans themselves.

But for the EU to uphold its position for two full weeks is no small achievement, especially by the low standards of EU foreign policy. And it is even more impressive that all of this was done without brutal pressure from the United States—unlike in the case of sanctions against Iran.

Ukraine is the first real strategic test of EU foreign policy. Never before has the EU been forced to operate on the high seas of crisis management, on a potentially existential question, and without a process to guide it or the United States to cajole it.

It is possible that the EU will fail disastrously on Ukraine. It is perhaps even likely, given the odds. But at least the EU has shown that it is not impossible to do strategy with 28 member states. That experience cannot easily be undone.

Now, the EU must realize its enormous potential and run with it. Then, the Ukraine crisis, regardless of its outcome, could well be the start of something bigger than anyone has dared hope for.