from the North. The Northern Vietnamese who were considered as leaders by default portrayed Nationalism in such ways that the Red River Delta area’s tradition and culture took dominance. The Ngo Dinh Diem administration was indeed a foundation to “Northernize” South Vietnam. The South people were forced to learn the history of the North and to see any historical events taking place in the North as their origin points. All those learning was to enhance the power of the Northern administration rather than for the sake of learning the past. On the other aspect, the shortage of knowledge and consciousness about their origin was the major cause of the fact that South Vietnamese were unable to make use of their tradition and culture to defend themselves against the People's Army of Vietnam when they had to share political power to the Northern immigrants from the 1955 - who won the capital Saigon over the forces that were loyal to Emperor Bao Dai. The South people were pulled into an ambiguous Anti-Communism ideology promoted by the Northern migrants who seized power right after they set their steps to the land of the South. South Vietnamese people could not state or claim the fact that the Northerners were their enemy due to the appearance of millions of Northern migrants on the South territory, which caused a huge stumbling block to psychological warfare and building the social system. The Northern politicians (who migrated to the South in 1954) in the Republic of Vietnam government cared about nothing but power, they had no intention of defending the country (Republic of Vietnam - ROV) because the ROV was not their homeland but the South people’s. The Northern migrants’ easily seizuring power in the Southern land resulted in the corruption of some Northern-migrated high-ranked figures in both the ROV government and the Army of the Republic of Vietnam and the loss of the ROV’s independence on the international political chessboard. The invasion of South Vietnam is a prohibited topic in history teaching and on mainstream media of Vietnam. It is usually interpreted as a “reunification of the nation”. After The Fall of Saigon, the Northern communists turned their back on their comrades from the South (the Viet Cong and the Provisional Revolutionary Government of the Republic of South Vietnam). There are prejudice and discrimination towards the South people, specifically the people in the Southwest (Mekong Delta)