The PRD went on to win the 1957 Territorial Assembly elections, taking 35 of the 60 seats. In 1958 the party merged with the Dahomeyan Democratic Rally (RDD) to form the Dahomeyan Progressive Party, which was to be the Dahomeyan branch of the African Regroupment Party.[1] However, internal disagreements led to the parties splitting back into their original forms in 1959.[2]