At the end of 1931, the struggle movement of the Vietnamese working class was brutally suppressed by the French colonialists, and most of the Party and Red Trade Union cadres were captured by the enemy, causing the connection between the Party and the masses, between the Red Trade Union and the working class movement to be almost interrupted. In those conditions, despite the strict control of the French colonialists, the Red Trade Union still actively propagated, mobilized workers, and developed the organization. From 1932-1936, the revolutionary movement throughout the country began to recover.
From 1936-1939, the Red Trade Union organization changed its name to the Trade Union, the Friendship Association switched to a semi-public period of operation. Thanks to its flexible organization, suitable to the situation, the workers' movement in this period still developed strongly to a new peak. In September 1939, World War II broke out, the French colonialists surrendered and compromised with the Japanese fascists to resolutely suppress the anti-war democratic movement of our people, eliminating trade union freedoms.
Faced with that situation, the Trade Union and Friendship Association organizations had to withdraw into secret activities and take the name "Association of Anti-Imperialist Workers", in 1941 changed to "Association of National Salvation Workers" as the core for the activities of the Viet Minh organization.
Under the leadership of the Party, the Vietnam Trade Union is truly the center of solidarity of Vietnamese workers. With over 200,000 people in 1945, Trade Union members became the core force that made the August Revolution of 1945 successful, giving birth to the Democratic Republic of Vietnam - the first Workers-Farmers State in Southeast Asia.
