Supreme Commander for the Allied Powers
The Supreme Commander for the Allied Powers (Japanese: 連合国軍最高司令官, romanized: Rengōkokugun saikōshireikan), or SCAP, was the title held by General Douglas MacArthur during the United States–led Allied occupation of Japan following World War II. It issued SCAP Directives (alias SCAPIN, SCAP Index Number) to the Japanese government, aiming to suppress its "militaristic nationalism". The position was created at the start of the occupation of Japan on August 14, 1945.
Source: Wikipedia — Supreme Commander for the Allied Powers (CC BY-SA 4.0)