Robert Carl "Bud" McFarlane (born July 12, 1937) is a retired Marine Corps officer who served as National Security Advisor to President of the United States Ronald Reagan from 1983 through 1985.
After a career in the Marines, McFarlane became part of the Reagan administration and was a leading architect of the Strategic Defense Initiative (SDI) for defending the United States against missile attack. Subsequently, he was involved in, and pleaded guilty to charges for actions related to, the Iran-Contra affair, but received a pardon from President George H.W. Bush.
After graduating high school, McFarlane entered the United States Naval Academy at Annapolis in 1955, where he graduated in 1959. He was the third member of his family to attend the Academy, after his uncle Robert McFarlane (1925) and his brother Bill (1949). At the academy he graduated in the top 15 percent of the class and lettered twice in gymnastics. He received an honorary doctorate from the Institute of World Politics in Washington, D.C. in 2014. He sang in the Chapel Choir, and was a Brigade Administrative Officer and 14th Company Commander.
Following graduation from the Naval Academy in 1959, McFarlane was commissioned a second lieutenant in the Marine Corps, where he served as a field artillery officer.
As a Marine Corps officer, McFarlane commanded platoons, a battery of field artillery howitzers and was the Operations Officer for an artillery regiment. He taught Gunnery at the Army Advanced Artillery Course. He was the executive assistant to the Marine Corps' Operations Deputy from 1968–1971, preparing the deputy for meetings with the Joint Chiefs of Staff. During this assignment he was also the Action Officer in the Marine Corps Operations Division for Europe/NATO, the Middle East and Latin America.