Ian Bremmer: Will Europe step up as America turns its back on Ukraine?

March 5, 2025

Source: GZERO

In geopolitics, there are moments that define decades. Europe is facing one of those inflection points right now. How it responds will determine not just Ukraine’s fate but the continent’s future.

For generations, Europe has comfortably sat under the American security umbrella, content to let the United States shoulder the burden of its defense while it reaped the economic and geopolitical dividends of the resulting peace. But the events of the past week have exposed the fragility of this arrangement and laid bare the extent of America’s retreat from its role as guarantor of European security under President Donald Trump.

In a televised meeting with Volodymyr Zelensky last Friday, Trump declared himself “neutral” between Russia and Ukraine and “on the side of peace,” dismissing the Ukrainian president’s pleas for security guarantees before unceremoniously kicking him out of the White House. Days later, the Trump administration froze all military aid to Ukraine and suspended offensive cyber operations against Russia. the US also paused intelligence sharing with Kyiv, blinding the Ukrainian military and immediately crippling its ability to fight.

The message from these moves was clear: The United States is no longer on Ukraine’s side – and by extension, it may no longer be on Europe’s side either. If the US is willing to abandon a country whose security is indivisible from Europe’s – and a pro-American democracy we were committed to protect, no less – why wouldn’t he do the same to an EU or NATO member? The realization that Trump’s turn away from Kyiv is genuine sent shockwaves through European capitals, seemingly galvanizing them to finally start taking a leadership role for both Ukraine’s and their own defense.

The warm embrace Zelensky received during last weekend’s emergency London summit of European leaders could not have contrasted more sharply with the hostile treatment he suffered in the Oval Office just days earlier. Hugs with European leaders were followed by dozens of shows of unity, expressions of support, and pledges to increase defense spending and aid to Kyiv.

But Europe has a long history of talking a big game and falling short when it counts. Is Europe ready to actually step up this time? Or will this moment, like so many before it, end in half measures and hollow promises?

There is reason for cautious optimism that his time will be different. Unlike previous moments of crisis, European leaders at least recognize the existential nature and urgency of the challenges. As European Commission President Ursula von der Leyen acknowledged, “This is Europe’s moment, and we must live up to it.”

Just hours ago, French President Emmanuel Macron said that the “future of Europe cannot be decided in Washington or Moscow,” while even his arch-rival Marine Le Pen, a longtime admirer of Vladimir Putin, condemned Trump’s aid freeze as “brutal”. The show of unity and clarity of purpose are unlike anything we’ve seen in recent history.

Europe’s top priority should be to find a way to keep Ukraine in the fight without the Americans while simultaneously boosting Europe’s defense capabilities. This is a tall order, but in theory, it’s not impossible. After all, the continent has an economy ten times the size of Russia’s, and European contributions to Ukraine already exceed American ones (even if the US has provided the bulk of the military support).

Just in the last few days, European leaders have put more money on the table for defense spending and military aid to Ukraine than they had in the past three years. Here, the most promising development has been Germany’s game-changing decision to exempt infrastructure and defense spending from its strict borrowing rules, effectively allowing Europe’s largest economy to raise an unlimited amount of debt to upgrade its military and fund aid to Ukraine.

Declaring an “era of rearmament,” Von der Leyen also unveiled a plan yesterday called “ReArm Europe” to set up a €150 loan facility for military procurement and relax EU fiscal rules for member states wanting to increase defense spending. The most serious commitment we’ve seen from Brussels in years, this proposal could unlock up to €800 billion in defense spending over the coming years.

European Union leaders will meet in Brussels on Thursday to discuss this plan and try to craft an aid package for Kyiv. Support is also growing within Europe for the seizure of the €300 billion in frozen Russian assets held in the EU (mostly in Belgium) – the one source of unilateral leverage European capitals have with Russia – which could add another potential funding stream for Ukraine’s defense and reconstruction.

All these moves would have been unthinkable just weeks ago, and they will go a long way toward rearming Europe and bolstering Ukraine’s capabilities.

But money alone is not enough.

Decades of underinvestment and overreliance on the United States to provide everything from intelligence to logistics to advanced weaponry have hollowed out Europe’s military infrastructure. Germany’s Rheinmetall and other European defense firms are ramping up production, but building enough of the systems Ukraine needs to stay in the fight will take time – time that Ukraine does not have. And there are some critical gaps left by the US cutoff that Europe will be unable to either fill or buy.

To be clear, the suspension of US aid will not lead to an imminent collapse of Ukraine’s defenses. The country already produces much of its weaponry domestically, often in joint ventures with European defense firms like Rheinmetall and the Franco-German KNDS, and it has enough equipment stockpiled to hold the line until summer.

Increased European support can extend the runway by a few months. But Europe can’t do anything to help Ukraine solve its growing manpower shortage. Kyiv will likely struggle to sustain the fight much beyond August.

That’s why Europeans must also grapple with the question of how to credibly guarantee Ukraine’s long-term security once the fighting stops. Trump has made it clear that he wants to end the war as quickly as possible at any price. Never mind that a ceasefire without the strong security guarantees that Zelensky insists on and Trump waves away would make it likely the Russians will come back for more, posing a permanent threat on Europe’s doorstep.

British Prime Minister Keir Starmer and French President Emmanuel Macron have proposed a European peacekeeping force with 15,000-30,000 troops from a “coalition of the willing” to credibly deter future Russian aggression. The idea is feasible and shows the Europeans have seized a level of agency they didn’t have before.

While the US president is reportedly open to the plan, it is fraught with a seemingly intractable contradiction: Starmer and Macron, who have already pledged British and French troops, remain adamant on the need for a US military backstop for those peacekeepers – an apparent nonstarter as Trump doesn’t want to risk World War III. But neither of these positions is set in stone, so the European plan is still on the table.

There is, of course, the question of whether Russia would even accept European troops in Ukraine as part of a ceasefire deal. Trump claims that Putin told him yes, but the Kremlin refutes that. In fact, color me skeptical that Putin is interested in negotiating a ceasefire at all when the Ukrainians have been cut off from US military support, their battlefield and negotiating position is only set to improve as time goes on, and rapprochement with the United States (possibly including unilateral sanctions relief) is on the horizon.

Russia leverage these advantages to gain more Ukrainian territory and widen Western divisions, undermining Trump’s stated goal of achieving peace while seeking to extract bilateral concessions from the US. All Europe can do in that scenario is stay united in support of Ukraine, strengthen Kyiv’s position as much as possible, and try to persuade Trump to turn against Moscow.

The coming weeks and months will be the ultimate test of Europe’s mettle. If it can stand up in defense of its principles, values, and fellow Europeans, it will emerge stronger and more united than ever before. If it fails, Europe’s own security and days as a credible geopolitical actor may well be numbered.

This article is from WWSG thought leader, Ian Bremmer.

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