Pierre (Peter) Julien Ortiz OBE (July 5, 1913 – May 16, 1988) was a United States Marine Corps colonel who received two Navy Crosses for extraordinary heroism as a major in World War II. He served in North Africa and Europe during the war, as a member of the French Foreign Legion, the U.S. Marines and the Office of Strategic Services (OSS), operating behind enemy lines several times. Ortiz also acted in Hollywood films after the war. He was one of the very few U.S. Marines to serve in combat in Europe during World War II, and one of the most decorated Marine officers of the war.