The Pentagon halted a planned rotation of about 4,000 US Army troops, specifically the 2nd Armored Brigade Combat Team, 1st Cavalry Division, to Poland days before May 18, 2026 [1, 2]. The cancellation surprised Polish officials, who are treating the matter as an incident requiring urgent explanation. "We are treating this as an incident, which we will be clarifying this week," said Polish Deputy Defense Minister Pawel Zalewski, who added, "We will ask questions and I guess that we will get answers" [1, 2].

US Army General Christopher LaNeve told Congress that commanders had been instructed to reduce troop levels in Europe, leading to the conclusion that the brigade’s deployment should be canceled [1]. The Pentagon said the withdrawal decision followed a "comprehensive, multilayered process that incorporates perspectives from key leaders in EUCOM and across the chain of command," according to acting press secretary Joel Valdez [2].

Poland typically hosts about 10,000 US troops, mostly on rotational deployments lasting several months [2]. The government in Warsaw stresses that this cancellation does not mean a weakening of the country’s defense. Prime Minister Donald Tusk described the changes as logistical, stating they "would not weaken Poland's deterrence capabilities" [1]. Defense Minister Wladyslaw Kosiniak-Kamysz said Poland could gain from a more permanent US presence instead of rotations [1].

The National Security Bureau in Poland suggested the cancellation might relate to the upcoming withdrawal of the US Army’s 2nd Cavalry Regiment from Germany, but this remains unclear [1]. It is also not clear whether canceling this brigade rotation will lead to a permanent reduction of US forces in Poland [2].

Poland continues to expect expanding military cooperation with the US and considers itself a "model ally" within NATO [2]. In September 2025, then-President Donald Trump assured Poland’s president-elect that the US would maintain or potentially increase troop numbers there if requested. "We’re very much aligned with Poland. We’ll put more there if they want," Trump said [2].

Warsaw plans to press US officials for answers in the coming days as the two countries navigate the unexpectedly canceled troop rotation [1].