In South Korea, the war is often called "6•25", or the 6•25 War (Korean: 6•25 전쟁), from the date of the start of the conflict or, more formally, "Hanguk Jeonjaeng" literally “Korean War”. In North Korea, while commonly known as the Korean War, it is formally called the Fatherland Liberation War. In the early days of the war, United States President Harry Truman called the United Nations response a "police action". The war is sometimes called "The Forgotten War" because it is a major conflict of the 20th century that gets less attention than World War II, which preceded it, and the controversial Vietnam War, which succeeded it. In China, the conflict was known as the War to Resist America and Aid Korea, but is today commonly called the "Korean War".