الحزب الاشتراكي اليمني
On March 5, 1979 the party merged with the other founding parties of the NDF, forming the Yemeni Popular Unity Party. Four days later, the Popular Unity Party merged into the Yemeni Socialist Party (but retaining the name 'Popular Unity Party' for activities in North Yemen). The NDF did however continue to exist as a separate structure, with other groups joining and leaving it.