In 1989, units of the 5th Division, based at Fort Polk, Louisiana, deployed in support of Operation Nimrod Dancer to protect American interests in Panama. First Battalion, 61st Infantry (Mechanized), "Roadrunners" (1st Brigade, 5th ID) was one of the first reinforcing units and remained there until September when there was a hand over to 4th Battalion, Sixth Infantry (Mechanized), "Regulars" (2nd Brigade, 5th ID). 4–6 Infantry was in country and assisted during Operation Just Cause helping to overthrow Panamanian leader Manuel Noriega, and also assisted in an emergency extraction of Delta Force operators engaged in Operation Acid Gambit when their helicopter went down. Two Soldiers were killed in action from the 5th Infantry Division during Just Cause: CPL Ivan M. Perez and PVT Kenneth D. Scott.