[1][2] In a French National Assembly by-election in June that year, its candidate Georges Condat [fr] was elected with 72% of the vote.
[4] However, it suffered two major splits in the mid-1950s;[2] the first in 1953 followed disagreements about linking with the PPN in order to present a united front, and saw Condat leave to form the Nigerien Progressive Union (UPN).
The second split in 1955 was caused an attempt by some of its leadership to affiliate UNIS with the Indépendants d'outre-mer [fr] group in the French parliament,[5][6] with the majority of the party leaving to form the Nigerien Action Bloc (BNA).
[7][8] The 1956 French elections saw UNIS receive only 8% of the vote and lose both seats, with a BNA–UPN alliance and PPN winning one each.
UNIS was subsequently dissolved when Zodi Ikhia established the Nigerien Democratic Front in 1957.