Hq, Fourth U.S. Army 1966 - 1967 Fourth Army Shoulder Patch I was assigned to Fourth Army G2 (intelligence staff) located in the historical quadrangle of Fort Sam Houston, Texas.When I arrived, I found they already had a master sergeant who then automatically became excess.Rather than replacing him as Operations Sergeant, I took over the security section which processed security clearance applications and other duties.I supervised a civilian secretary for the only time in my career.A few months later I was asked if I wanted to go to Panama. After checking with my wife, I agreed. Fort Sam Houston Quadrangle Next: Hq, USSOUTHCOM