Retired Army Col. Roy Green, 84, who served on the old War Department's Army General Staff during World War II and later became an insurance executive, died Thursday at his home in Saverna Park, Md. He had a heart ailment.

As part of the War Department's operations division, Col. Green participated in planning and development for the Normandy invasion. He also was an observer for the Allied landings at Anzio, Italy. He retired from the Army in 1947.

In the late 1940s, Col. Green established the Armed Services Mutual Benefit Association to handle insurance for officers sent overseas. He was general manager of the associaiton for about five years before retiring.

In 1965, he returned to the insurance business as developer of an insurance program for West Point graudates for the Woodmen of the World Life Insurance Society. He was still active in the business at the time of his death.

Col. Green was born in Wolfe City, Tex. He graduated from the U.S. Military Academy at West Point in 1919. He later earned a degree in civil engineering from the Massachusetts Institute of Technology. He was a member of the Ohio National Guard before recalled to active duty in the Army in World War II.

Survivors include his wife, the former Sonia C. Jarvis, of Severna Park; a son, William T. Green, and a daughter, Elizabeth Lee Ritter, both of Cincinnati; a stepson, Paul Jarvis, of Bowie; three grandchildren, and three step-granchildren.