In response to French influence and manipulation which tried to destroy unity within Vietminh, the ICP was officially dissolved and downgraded into the "Institute for studying Marxism in Indochina" ("Hội Nghiên cứu Chủ nghĩa Marx tại Đông Dương") as a gesture to unite all nationalist and non-communist factors to fight against French and pro-French forces. In practice, the Vietminh became the leader of struggle for independence of Vietnam. The ICP was ostensibly dissolved, but its core was still functioning. According to the CIA, membership grew to about 400,000 members by 1950. In 1951, during the war for independence, the officially dissolved Communist Party was officially re-established and renamed the "Worker's Party of Vietnam" ("Đảng lao động Việt Nam"), often abbreviated as WPV and nicknamed the "Lao Dong Party". The Indochinese War against French forces lasted until 1954 with the Vietnamese victory at the Battle of Điện Biên Phủ.