Retired Air Force Brig. Gen. Sidney F. Giffin, a former program director at the institute for Defense Analyses, died Dec. 17 at the Naval Academy hospital in Annapolis after an apparent heart attack. He was 70.

Gen. Giffin, a 1933 graduate of the Military Academy at West Point, served in the Army Air Corps and then the Air Force until he retired in 1961.

During World War II he served in Europe, China and the South Pacific as a political and air adviser.

Following the war he served here and in Europe on air strategy and plans for what eventually became the North Atlantic Treaty Organization (NATO).

Gen. Griffin was an air adviser to then Secretary of State Dean Acheson at the 1949 Council of Foreign Ministers conference in Paris.

Among the many posts he held were vice commandant of the Air War College in the mid-1950s and director of the Office of Armed Forces Information and Education in the Defense Department. He held the latter position from 1957 until he retired.

Gen. Giffin joined the Institute for Defense Analysis (IDA) a nonprofit organization that conducts strategic studies under contract to the Defense Department, in 1951.

There he served on the staff and later was director of the defense analysis educational program. He retired in 1963, but remained a consultant to the institute.

Gen. Giffin was awarded the Legion of Merit for his work as a deputy division chief of the Air Force.

He was a member of the Council on Foreign Relations and was a founding member of the Institute for Strategic Studies in London. He is the author of "The Crisis Game."

He is survived by his wife, Gertrude L., of the home in Annapolis, a son, Sidney B., of Washington and a brother Dr. Lewis A. Giffin of Springfield, Mo.