1st Lt. Tyler Richard Estes, a tank platoon leader with 1st Battalion, 6th Infantry Regiment, 2nd Brigade Combat Team, 1st Armored Division, takes the oath of office with Lt. Col. Bryan Bonnema, battalion commander for 1st Bn., 6th Inf. Reg., after his promotion from second lieutenant, Feb. 4, 2021, during Iron Union 14 at Al Hamra Training Center in the United Arab Emirates. Iron Union is a recurring, military-to-military exercise between Task Force Spartan and UAE Land Forces to strengthen relationships and trust while working together in the Southwest Asia area of operation.

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