The Greek Expeditionary Force (GEF) in Korea was formed in response to the United Nations appeal for assistance in the Korean War. It comprised a reinforced Hellenic Army (HA) infantry battalion and the Royal Hellenic Air Force (RHAF) 13th flight of seven transport planes (C-47). Greece originally intended to send a brigade to Korea; upon consultation with the US, however, the expeditionary force was downgraded to a battalion attached to the US 1st Cavalry Division. The 13th Flight supported the US marine division and played an important role of evacuating the dead and the wounded. After the armistice, the RHAF unit withdrew in May 1955 and the HA unit in December 1955. Greece was the fifth largest troop contributor to U.N. Forces in Korea.