65th Infantry Regiment
"PORTREX" Puerto Rico - An officer of the 65th Infantry, Aggressor Force, interrogates an invasion spy who landed on Red Beach, Vieques Island, prior to D-Day to obtain intelligence for the invasion assault landings. The 65th Infantry together with the 33rd Infantry from Panama and other units stationed in Puerto Rico are defending Vieques Island during Operation PORTREX, the largest peacetime airborne-amphibious operation in which approximately 80,000 troops of the Army, Navy and Air Force will participate. - March 1950