A month into Russia’s invasion of Ukraine, President Joe Biden is in Brussels for an emergency meeting of NATO’s leaders. The onus on those leaders is to show continued solidarity even as relatively minor disagreements over matters like supplying old Soviet-era fighter jets to Ukraine threaten to rupture what’s been a highly coordinated response.
But there’s something bigger playing out at this summit: Moscow’s aggression has helped cut through nearly three decades of debate about NATO’s purpose and provoked an overdue return to form.
The North Atlantic Treaty’s original signers banded together as a defensive alliance to counter the Soviet military threat to Western Europe. But after the Soviet Union’s collapse, NATO, the organization that was created to enforce the treaty, lacked a raison d’être, let alone a clear strategic goal, even as its membership eventually expanded to 30 countries. Russian President Vladimir Putin’s decision to bring Ukraine back into the fold of Greater Russia by force has ironically given the bloc a new reason to exist — and it’s the exact same as the old reason.
Moscow’s onslaught has “given the alliance greater unity and purpose than it has known in decades,” former German Defense Minister Thomas de Maizière and A. Wess Mitchell, a former U.S. assistant secretary of state for Europe and Eurasia, wrote recently. “After years of complacency, allies are boosting defense spending, sending weapons to Ukraine, rushing reinforcements to NATO’s eastern flank, and finally thinking about diversifying their energy supplies.”
That clarity of purpose means the policy differences Biden faces this week are nothing compared to existential crisis the organization faced in the immediate aftermath of the Cold War. After the Warsaw Pact, NATO’s eastern counterpart, disbanded in 1991, there were calls for NATO to do the same. And yet it persisted, looking for a new mission to preserve the trans-Atlantic ties the alliance enabled.
Putin’s decision to bring Ukraine back into the fold of Greater Russia by force has ironically given the bloc a new reason to exist.
Starting in the mid-1990s, it looked like the bloc would find new purpose as primarily a peacekeeping and stabilization force. NATO forces were deployed in Bosnia under U.N. authorization to enforce a maritime blockade and a no-fly zone. Then, in 1999, NATO unilaterally launched a bombing campaign to halt Yugoslavia’s ethnic cleansing in Kosovo.
After the Sept. 11, 2001, attack by Al Qaeda, the U.S. for the first time invoked Article V of the North Atlantic Charter, which deems an attack on one member an attack on all. In its first mission outside Europe and North America, NATO took command of the International Security Assistance Force in Afghanistan for over a decade. Then, in 2011, it enforced a no-fly zone over Libya, a mission that soon expanded to provide air support for the rebels who then overthrew longtime dictator Moammar Gadhafi. The Libya intervention especially became an obsession of Putin’s and heightened his denouncement of NATO’s aggressive ambitions and the threat of its rhetoric promoting democracy.
Simultaneously, the alliance has spent these last 30 years debating how many, if any, members of the former East bloc it should bring into the fold. Germany was more or less a gimme after formerly communist East Germany’s reunification with West Germany. The other potential applicants were a thornier issue, with several former Warsaw Pact countries pressing for admission soon after the Iron Curtain fell. These were all countries that had been subject to Soviet military threats and outright invasions, and they looked to NATO for protection.








