General Sir Peter John Cosgrove, AK, CVO, MC (born 28 July 1947) is a retired senior Australian Army officer who served as the 26th governor-general of Australia, in office from 2014 to 2019. A graduate of the Royal Military College, Duntroon, Cosgrove fought in the Vietnam War, receiving the Military Cross in 1971. From 1983 to 1984, he was commander of the 1st Battalion, Royal Australian Regiment, and he later served as commander of the 6th Brigade and the 1st Division. Cosgrove rose to prominence in 1999, when he served as commander of the International Force for East Timor (INTERFET), which oversaw the peacekeeping mission in East Timor during its transition to independence. He is also an alumnus of National Defence College, India.