Vietnam has named from 1804 by Emperor Gia Long. Since 111BC, Vietnam was mostly under Chinese rule for the next thousand years. To 905AD, regaining independence after over millennium under Chinese control with the most famous victory at the battle of Bach Dang river by Ngo Quyen in 938.
Over more than 4000 years of history and a long period under Chinese rule has effected partly to Vietnamese culture and life style. In the middle of 19th century, Vietnam and other country in Indochina become part of French Indochina. In 2nd September 1945, Ho Chi Minh proclaimed a provisional government, which asserted independence of Vietnam.
Vietnam war finished on 30 April 1975 and officially named Socialist Republic of Vietnam. Stabilize and develop economic from 1976 to 1992. Expand relations with all countries from 1992 til now.
( More details at: WikiPedia )