Canceled Poland Deployment Further Weakens American Deterrence in Europe

In a move that will likely send shockwaves across Europe, the Pentagon reportedly halted the scheduled deployment of a roughly 4,000-strong U.S. Army armored brigade to Poland on Wednesday.

The news follows the Trump administration’s decision earlier this month to withdraw approximately 5,000 American troops from Germany amid a spat between President Donald Trump and German Chancellor Friedrich Merz over the war with Iran.

These prospective troop cuts are the latest in a series of steps by the administration to weaken American combat power in Europe. With Trump warning of additional cuts, American military force posture on the continent could fall to dangerously low levels, eroding deterrence and incentivizing Russian aggression.

A Pattern of Withdrawals and Canceled Deployments

An Army official confirmed on May 14 that the Pentagon had canceled the scheduled rotational deployment of an Armored Brigade Combat Team (ABCT) to Poland despite the Trump administration previously lauding the U.S.-Polish alliance. The unit, a portion of which had reportedly already arrived in Poland, was expected to deploy for nine months to replace the previous rotational ABCT in Poland. These rotational ABCTs, which regularly train in the Baltics, are a central pillar of American deterrence in Europe because they allow U.S. forces to rapidly respond to contingencies along NATO’s eastern flank.

This cancellation came roughly two weeks after the Trump administration announced that it would withdraw roughly 5,000 troops over the next six to 12 months from Germany. The drawdown will reportedly impact the 2nd Cavalry Regiment (2CR), which has been a mainstay of American combat power in Europe since the Cold War and is currently the only forward-stationed Stryker Brigade Combat Team (SBCT) on the continent. The planned deployment of a newly activated long-range fires battalion (LRFB) of the Europe-based 2nd Multi-Domain Task Force (MDTF) was also reportedly canceled, leaving U.S. forces without key long-range fires capabilities. However, reporting from The New York Times on May 14 indicated that internal planning for the drawdowns may still be ongoing and that a net reduction of 5,000 troops might be spread across Poland, Germany, and other European countries.

A Weakened U.S. Force Posture in Europe

While significant U.S. forces will remain in Europe regardless of the precise details of the withdrawals, the cumulative impact of these successive drawdowns could bring America’s military force posture on the continent closer to pre-2022 levels. Since Russia’s full-scale invasion of Ukraine in 2022, the United States had generally maintained at least four Brigade Combat Teams (BCTs) in Europe: 2CR, the forward-stationed 173rd Airborne Brigade headquartered in Italy, the rotational ABCT in Poland, and a rotational Infantry Brigade Combat Team (IBCT) in Romania and surrounding countries.

But the administration’s decision to end the rotational IBCT deployment to Romania last fall brought that number down to three. If 2CR is withdrawn from Germany and the rotational ABCT deployments to Poland are ended, America would only retain a single BCT and no large armored or mechanized combat formations on the continent. Likewise, the 2nd MDTF would be substantially weaker without its organic long-range fires capabilities. While there could be some justification for concentrating finite U.S. long-range fires capabilities in the Pacific, ABCTs and SBCTs suited for large-scale ground combat are more valuable deterring Russia than countering China.

Congress Should Help Maintain Deterrence

America’s forward-deployed and forward-stationed combat units in Europe are the bedrock of deterrence against Russian aggression. As Putin continues his onslaught against Ukraine and contemplates potential future aggression against NATO, American steel and combat power on the continent are the greatest guarantors against that catastrophic scenario. The administration’s successive actions to weaken that combat power dangerously undermine deterrence and incentivizes the very same Russian aggression that those units are intended to prevent.

If the administration does not reverse these harmful decisions, Congress should ensure that the administration complies with provisions in the 2026 National Defense Authorization Act that prohibit total U.S. troop levels in Europe from dropping below 76,000. Likewise, Congress should craft additional legislation to protect the combat formations and capabilities most needed to deter Russia.

Cameron McMillan is a senior research analyst at the Foundation for Defense of Democracies’ (FDD’s) Center on Military and Political Power (CMPP), where Ryan Brobst is the deputy director. For more analysis from the authors and CMPP, please subscribe HERE. Follow Ryan on X @RyanBrobst_. Follow FDD on X @FDD and @FDD_CMPP. FDD is a Washington, DC-based, nonpartisan research institute focusing on national security and foreign policy.