17th parallel north 17th parallel north The 17th parallel north is a circle of latitude that is 17 degrees north of the Earth's equatorial plane. It crosses Africa, Asia, the Indian Ocean, the Pacific Ocean, Central America, the Caribbean and the Atlantic Ocean. The parallel is particularly significant in the history of Vietnam (see below). At this latitude the sun is visible for 13 hours, 9 minutes during the summer solstice and 11 hours, 7 minutes during the winter solstice. Starting at the Prime Meridian and heading eastwards, the parallel 17° north passes through: The Seventeenth parallel () was the provisional military demarcation
Quagmire theory the world. In the same year, the First Indochina war commences. This war between the Vietminh and the French, concluded with the Battle of Dien Bien Phu, a decisive victory by the Vietminh. From the First Indochina War, two states emerged, the Communist ruled north and the south, split by the 17th parallel-agreed upon at the Geneva Convention in 1954. Soon after, in 1955, war breaks out between the north and south. The domino theory was a well-accepted theory during this time period, introduced by Dwight D. Eisenhower, states that if one country falls to communism, then the rest of