Retired Army Maj. Edward York, 100, an old-time horse cavalryman and an instructor in military subjects at Howard University and then at the old Dunbar High School here for many years, died Oct. 8 at the Veterans Administration Hospital in Los Angeles. He had a heart ailment.

Maj. York, who was born in Coffeeville, Ala., enlisted in the cavalry on Aug. 15, 1898, for service in the Spanish-American War. He rose from private to trumpeter to first sergeant of "A" Troop, 9th Cavalry. He served three tours of duty in the Philippines, throughout the western United States and along the Mexican border.

During World War I, he was promoted to captain and went to France as commander of Company C, 367th Infantry, 92nd Division. He was wounded at the battle of La Chappelle in the Vosges mountains and received the Purple Heart Medal.

After the war, Maj. York moved to Washington. From 1919 to 1922, he was professor of military science and tactics for the Reserve Officers Training Corps at Howard University. From 1922 until he retired in 1937, he was military instructor for the high school cadet program at Dunbar. He was promoted to major in the Army Reserves in 1929.

Maj. York, who had lived in Los Angeles for many years, organized and trained an infantry company of the California State Guard during World War II. He held a Certificate of Capacity for Colonel of Cavalry from the governor of California.

Survivors include his wife, Anna Redmond York, and four sons and one daughter, all of Los Angeles, and nine grandchildren.