"She is my friend" (the fourth grade text of primary school) was written by John Gao. About the author: John Kao (born in 1950) is a writer and strategic consultant who teaches at Harvard Business School. The Vietnam War has multiple meanings, including: French Vietnam War, American Vietnam War, Vietnamese Civil War, China Vietnam War (see self-defense counterattack against Vietnam), and the most famous is American Vietnam War. This article refers to the Vietnam War in which the United States participated. The Vietnam War (196 1 ~ 1975) is now called the War to Resist America and Save the Nation by the Vietnamese government. It is the new democratic Democratic Republic of Vietnam (North Vietnam) and the Southern Vietnam National Liberation Front (so-called Vietnam National Liberation Front) against the United States and its puppet regime, the Republic of Vietnam. The United States lost the war (although the American government claimed to be a "glorious retreat"). The Vietnam War was a "hot war" in the Cold War. With the support of Ho Chi Minh, the leader of North Vietnam, the National Liberation Front, a southern anti-government force that hoped to unify Vietnam, opposed the Wu Tingyan government in South Vietnam. The United States sent troops to help South Vietnam. The first American president to foster South Vietnam was dwight david eisenhower; John fitzgerald kennedy (john fitzgerald kennedy) began to support the Vietnam War; Lyndon johnson expanded the war. During the reign of Richard Richard Milhous Nixon, the United States gradually withdrew its troops from Vietnam due to the domestic anti-war wave. The North Vietnamese army and the South Vietnamese army finally defeated the South Vietnamese government army and unified the whole territory of Vietnam.