The U.S. Military Presence in Europe Is No Longer a Guarantee

In late May, President Trump announced he was sending 5,000 additional troops to Poland. He gave a reason, and it was not Russia ^[1].

Based on the successful Election of the now President of Poland, Karol Nawrocki, who I was proud to endorse, and our relationship with him, I am pleased to announce that the United States will be sending an additional 5,000 Troops to Poland. — Donald Trump

The deployment was a reward. Trump had endorsed Karol Nawrocki in Poland's presidential election; Nawrocki won; the troops followed. The American military presence in Europe, for seventy-five years the bedrock guarantee that an attack on one ally was an attack on all, had been converted into something else: a personal favor, dispensed to a friendly leader and withdrawable from a critical one. Two weeks earlier, the administration had withdrawn 5,000 troops from Germany. The timing was not subtle. Chancellor Friedrich Merz had just criticized the United States for lacking an exit strategy in its escalating war with Iran ^[2].

this is not our war — Keir Starmer

Days later, Secretary of State Marco Rubio told NATO allies in Helsingborg that American troop levels in Europe would be adjusted while conveying the president's displeasure at the lack of support for Iran operations ^[3].

The president's views, frankly disappointment, at some of our NATO allies and their response to our operations in the Middle East - they're well documented - that will have to be addressed. — Marco Rubio

The quid pro quo ran in both directions, and it was no longer hidden. The 2026 National Defense Strategy, released in January, made the shift doctrinal ^[4].

Europe taking primary responsibility for its own conventional defense is the answer to the security threats it faces. — Federal government of the United States

European allies have absorbed the message. They are not waiting for Washington to change its mind, and they are not responding in unison. The continent has split three ways. On one side, Western and Southern Europe are treating the American military presence as a liability to be constrained. Spain closed its airspace to U.S. military flights and denied access to the naval base at Rota and the air base at Morón. Italy refused American bombers permission to land at Sigonella. France blocked Israeli aircraft from transiting American weapons through its territory ^[5]. These were not diplomatic protests. They were physical denials — allies using their sovereign territory to limit what the United States could do. On NATO's eastern flank, the calculation is the opposite. Poland invited the United States to establish a permanent military base with 11,000 to 15,000 personnel ^[6]. Romania is doing the same. These countries see a vanishing American presence and are racing to lock in what they can before it disappears. Yet even here, the old deference is cracking. In March, Poland rejected a U.S. request to redeploy its Patriot missile batteries to the Middle East. Defense Minister Władysław Kosiniak-Kamysz was blunt ^[7].

Our Patriot batteries and their armament are used to protect Polish airspace and NATO's eastern flank. Nothing is changing in this regard, and we are not planning to relocate them anywhere. — Władysław Kosiniak-Kamysz

Even the ally most eager for American troops was unwilling to hand over its own air defenses on demand. Beneath the split, every ally is doing the same thing: building a defense architecture that does not assume American protection. Germany plans a €108 billion defense budget by 2026 ^[8]. The European Union is developing an operational handbook for Article 42.7, its mutual-assistance clause — a provision that has existed on paper for years but is only now being turned into something a military planner can use ^[9]. In November, a full brigade of European soldiers deployed to the Carpathians under French command, without significant U.S. support — a wargame that would have been unthinkable as anything but a NATO exercise a decade ago ^[10]. Germany's Vice Chancellor Lars Klingbeil put the logic plainly in January ^[11].

We must defend this order, even without our American partners if necessary. — Lars Klingbeil

The replacement architecture is already standing, because no one on either side is waiting for the old classification to come back.