In a move that’s sent ripples through the U.S. military community and international observers alike, the Army has abruptly removed Lieutenant General Charles Costanza from command of V Corps, the key American Army formation responsible for overseeing U.S. operations across Europe. The decision, confirmed by Army officials in early August 2026, comes nearly two months before Costanza was scheduled to hand over the reins in October—a timeline that had already been set for a leadership transition.
The Army’s V Corps, which Costanza has led since April 2024, is headquartered at Fort Knox, Kentucky, with its forward deployment hub at Camp Kościuszko in Poland. Since Russia’s full-scale invasion of Ukraine, V Corps has played a central role in coordinating U.S. military support for Kyiv and managing the American presence along NATO’s eastern flank. The corps’ responsibilities have only grown as tensions between Russia and the West have escalated, making Costanza’s sudden removal all the more significant.
“Lt. Gen. Charles D. Costanza, commanding general, V Corps, was removed from command,” an Army spokesperson told Task & Purpose. The Army confirmed that the matter had been referred to the appropriate authority in accordance with Army regulations, but declined to provide further details about the cause of Costanza’s removal. As reported by The Hill, “the Army confirmed the removal, adding the matter was ‘referred to the appropriate authority in accordance with Army regulations.’”
Brigadier General John B. Mountford, deputy commanding general for readiness of V Corps, has stepped in as acting commanding general. Meanwhile, Major General Thomas Feltey, who was nominated for promotion last month and previously led the 1st Cavalry Division at Fort Hood, Texas, is set to assume command of V Corps in October 2026, as originally scheduled. According to ABC News, Feltey’s Senate confirmation for the leadership handoff had already been planned, meaning the transition itself was not unexpected—just its timing.
The circumstances behind Costanza’s removal remain shrouded in mystery. The Army has not publicly disclosed the specific reason, and officials have been tight-lipped, citing privacy and personnel policies. Two U.S. officials told reporters that the removal was not political and was not initiated by Defense Secretary Pete Hegseth. One source, as quoted by The Hill, described the grounds as “conduct that would get a commander relieved at any level,” while a former defense official cited alcohol problems as a possible contributing factor. No official cause has been confirmed by the Army.
What’s clear is that Costanza’s departure is unfolding against a turbulent backdrop for the U.S. military’s senior leadership. More than two dozen high-ranking officers have been removed or sidelined under Hegseth’s tenure as Defense Secretary, often without detailed public explanation. The shake-up has affected every branch, including the Army, with recent removals of the Army chief of staff, General Randy George, and General Chris Donahue, the commander of U.S. Army Europe and Africa. However, multiple sources familiar with Costanza’s case have emphasized that his removal is not part of this broader effort to reshape the Pentagon’s top brass and is not politically motivated. As ABC News reported, a source familiar with Costanza’s removal said it was “unrelated to Hegseth’s broader effort to reshape the military’s top leadership and not due to any political implications.”
Costanza, an armor officer, brought extensive experience to his role. Before taking command of V Corps, he led the 3rd Infantry Division at Fort Stewart, Georgia, from 2021 to 2023, and served as deputy commanding general of U.S. Army Europe – Africa. He also holds a master’s degree in military studies from American Military University. His leadership tenure at V Corps coincided with a period of increased U.S. engagement in Europe, especially following the Russian invasion of Ukraine in 2022. V Corps, reactivated in 2020, was intended to bolster the U.S. military presence in Europe and enhance coordination with NATO allies, particularly under Operation Atlantic Resolve.
The timing of Costanza’s removal comes as the Pentagon is reevaluating its force posture in Europe and making significant adjustments. Earlier this year, the Pentagon canceled a planned deployment of the Army’s 2nd Armored Brigade Combat Team, 1st Cavalry Division—a unit based at Fort Hood, Texas—to Poland. This decision, made in May 2026, drew sharp criticism from Polish officials and raised questions about the U.S. commitment to NATO’s eastern flank. In response to the outcry, former President Donald Trump announced that the U.S. would deploy 5,000 troops to Poland, a move intended to reassure Warsaw and other NATO allies of America’s ongoing support.
Poland’s Defense Minister, Władysław Kosiniak-Kamysz, stated in June that the return of U.S. service members to the country would materialize in the “coming weeks.” Yet, as of late July, Rep. Don Bacon, a member of the House Armed Services Committee, told The Hill that the U.S. still had not sent an Army brigade to Poland. “They’re sitting down,” Bacon remarked. “They’re trying to wait them out or something. I don’t know what they’re doing.”
V Corps’ forward deployment hub at Camp Kościuszko, Poland, remains a centerpiece of U.S. military operations in Europe. The base is home to U.S. Army Garrison, Poland, and serves as a vital link for rotating American forces and coordinating multinational exercises. The corps’ mission has only grown in importance as the U.S. continues to provide military aid and support to Ukraine, while also reassuring NATO allies facing an emboldened Russia.
The abrupt removal of Costanza comes on the heels of other high-profile command changes in the Army. In June 2026, General Christopher Donahue relinquished command of U.S. Army Europe and Africa, with Lieutenant General Kevin Admiral nominated as his replacement. These changes, along with the Pentagon’s ongoing review of American force posture on the continent, have fueled speculation about the future of U.S. military strategy in Europe.
Despite the uncertainty, Army officials have maintained that the leadership transition at V Corps will continue as planned. Major General Feltey, already confirmed by the Senate, is expected to bring continuity and stability to the corps as it navigates a complex security environment. For now, Brigadier General Mountford is holding the reins, ensuring that day-to-day operations and support for Ukraine remain uninterrupted.
As for Costanza, his sudden departure leaves unanswered questions about the internal dynamics of the Army and the pressures facing senior military leaders in an era of heightened global tension. While the Army’s silence on the specifics is notable, officials have been adamant that the move is not a sign of shifting U.S. policy in Europe or a reflection of political maneuvering at the Pentagon.
The leadership shake-up at V Corps serves as a stark reminder of the challenges and scrutiny facing the U.S. military at a time when its presence and resolve in Europe are being tested. With new commanders stepping in and ongoing reviews of force posture, the Army’s ability to adapt—and reassure both allies and adversaries—remains under the spotlight.