U.S. Soldiers of 4th Battalion, 6th Infantry Regiment, 3rd Armored Brigade Combat Team, 1st Armored Division, conduct vehicle maintenance at the Unit Maintenance Collection Point during exercise Balkan Sentinel at Koren Training Area, Bulgaria, June 3, 2025. The Bulgarian national exercise, Balkan Sentinel, will be linked to Immediate Response 25 and consists of a battalion from the U.S. Army's 3rd Brigade Combat Team, 1st Armored Division, one Forward Land Forces (FLF) multinational battlegroup and the Bulgarian Land Force Command conducting a battalion-level live-fire exercise at Novo Selo TA and Koren TA. The FLF is one of eight battlegroups contributing to NATO’s forward presence and is hosted by Bulgaria, with Italy being the...
