Retired Army Maj. Gen. Thomas E. DeShazo, 80, a combat veteran of both world wars and the Korean conflict, died in Mariana, Fla., Wednesday after apparently suffering a heart attack.

He was stricken while en route from Alabama to his home in Winter Park, Fla. He had moved to Winter Park last fall from Alexandria, where he had lived since retiring in 1961.

An artillery officer, Gen. DeShazo was deputy commander of the 3rd Army at Fort McPherson, Ga., when he retired. From 1956 to 1959, he had commanded Fort Sill, Okla.

He was born near Montevallo, Ala. He left home as a teenager and joined the U.S. Army, serving with Gen. John J. Pershing on the Mexican border. In World War I, he served with an Army cavalry unit in France.

After the war, Gen. DeShazo received his discharge from the Army and was later given an appointment to the Military Academy at West Point, where he graduated in 1926.

During the 1930s, he had assignments in Hawaii and then in the Philippines. In World War II, he commanded artillery units in Africa, Sicily, Italy, Southern France and Germany.

He was assigned to the office of the chief o of operations at the Pentagon in 1950 and from there was sent to Korea, where he commanded the 2nd Infantry Division during the Korean war.

From 1953 to 1956, Gen. DeShazo was chief to the Military Assistance Advisory Group in Paris, France.

After retiring from military service and moving here, he was a consultant on aid programs to the State Department, traveling to Taiwan and Pakistan on inspection tours. He retired for a second time in 1963.

Gen. DeShazo's decorations included the Distinguished Service Medal, the Legion of Merit, the Silver Star, the Bronze Star with two Oak Leaf clusters, the Air Metal and decorations from France and Italy.

He is survived by his wife, the former Olive Sharrett, of the home in Winter Park; a son, Army Col. Thomas E. Jr, of Omaha; two daughters, Dr Anne Robertson, of Tiburon Calif., and Elizabeth Willis, of Richmond; a sister, Kathleen Norton, of Montgomery, Ala., and eight grandchildren.