National Democratic Front (Yemen)
National Democratic Front was founded as an umbrella of various opposition movements in North Yemen on February 2, 1976 in Sana'a. The five founding organisations of NDF were the Revolutionary Democratic Party of Yemen, Organisation of Yemeni Revolutionary Resistors, the Labour Party, the Popular Vanguard and the People's Democratic Union.
On March 5, 1979, the five founding parties of the NDF merged to form the Yemeni Popular Unity Party. The NDF did however continue to exist as a separate structure. It was joined by Qassem Salaam's Ba'ath Party, and the Septembrist Grouping. In 1978 the Ba'ath Party left the front and in 1979 the June 13 Front of Popular Forces joined it.