Transfer of Authority: Southern Border Sustainment Mission Shifts to 1st Armored Division at Fort Bliss

The event marked the transition of sustainment operations supporting Joint Task Force–Southern Border.

Source: 1st Armored Division (via Facebook)
Dept. of Defense War photo by Sgt. 1st Class Kyle Larsen

Cover Photo Caption: U.S. Air Force Brig. Gen. Brian A. Filler, deputy commanding general for maneuver of Joint Task Force-Southern Border, addresses the Soldiers of the 10th Mountain Division Sustainment Brigade and the 1st Armored Division Sustainment Brigade to deliver keynote remarks during a transfer of authority ceremony at Fort Bliss, Texas, June 1, 2026. Filler congratulated the 10th Mountain Division Sustainment Brigade on the successful completion of its deployment in support of the task force and welcomed the 1st Armored Division Sustainment Brigade.

A joint color guard from the 10th Mountain Division Sustainment Brigade and the 1st Armored Division Sustainment Brigade rendered honors during a transfer of authority ceremony at Fort Bliss, Texas, June 1, 2026. The event marked the transition of sustainment operations supporting Joint Task Force–Southern Border.

Brig. Gen. Brian A. Filler thanked the 10th Mountain DSB for its successful deployment and welcomed the 1AD DSB as it assumed responsibility for the mission. The casing of the 10th Mountain colors signified the completion of its support to JTF‑SB.

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U.S. Northern Command continues working with the Department of Homeland Security and U.S. Customs and Border Protection to provide unique military capabilities within defined authorities to help protect the U.S. southern border.