The party was formed in June 1958 when the Anti-Fascist People's Freedom League (AFPFL) split in two following internal disputes that had intensified since its January congress;[1] One group was led by Prime Minister U Nu, which he named the "Clean AFPFL"; the other was led by Kyaw Nyein and Ba Swe and became known as the Stable AFPFL.
Although the Stable faction was supported by the larger group of AFPFL members in the Chamber of Deputies, U Nu was able to continue as Prime Minister due to support from the National United Front and some of the independent MPs.
[1] However, the dispute between the two factions continued to worsen and in September 1958 the Army brokered a compromise, taking power with a government headed by Ne Win until elections were held eighteen months later.
In 1962 U Nu's government was overthrown by a military coup led by Ne Win.
The leadership of the Stable AFPFL refused to co-operate with the military government, and the party was dissolved.