Ngo Dinh Diem 25 June 1954, Diệm returned from exile, arriving at Tân Sơn Nhứt airport in Saigon. On 7 July 1954, Diệm established his new government with a cabinet of 18 people. On 21 July 1954, the Geneva accords temporarily partitioned Vietnam at the 17th parallel, pending elections in 1956 to reunify the country. The Democratic Republic of Vietnam controlled the north, while the French-backed State of Vietnam controlled the south with Diệm as the Prime Minister. Diệm criticized the French for abandoning North Vietnam to the Communists at Geneva, claimed that the terms did not represent the will of the Vietnamese
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