In 1987, encouraged by General Fred Woerner, Commander in Chief of the Southern Command, US Army, Sprague began a series of paintings of U.S. army training maneuvers in Panama.  He accompanied troops on jungle training exercises and in parachute jumps.  This resulted in a series of 10 paintings, nine of which were presented to the US Army at a ceremony in the Pentagon in 1988. The following year, the United States invaded Panama to remove the notorious dictator Manuel Noriega, and in January 1990 Sprague was invited to chronicle the activities of “Operation Just Cause.” This resulted in 10 paintings, which were presented to the U.S. Army at a ceremony in Fort McNair.