In the post-war period, when the contours of a National Government were becoming apparent, the political rivalry within the trade unions became even more acute. The Congress tried to influence the AITUC and its unions to work along Gandhian lines and in support of the Congress. But by then the communist influence had grown very strong. The Congress, therefore, founded the Indian National Trade Union Congress (INTUC) in May 1947. In 1948, the union under the influence of the Congress Socialists came out of the AITUC and formed the Hind Mazdoor Panchayat.
In 1949, another organization called United Trade Union Congress (UTUC) was formed under the famous trade union leader, Mrinal Kanti Bose. In 1949, the HMP and the IFL united to found the Hind Mazdoor Sabha (HMS). Its founders included Ashok Mehta, Basawon Singh, TS Ramanujam, etc. Thus, in 1949, there were four central Trade Union Federations-the AITUC, the INTUC, the HMS, and the UTUC. Other important worker’s organizations were the Kamgar Hitavardhak Sabhan (1909), the Social Service League (1911), the Amalgamated Society of Railway Servants of India (1897), the Printers Union of Calcutta(1905), Postal Union in Bombay. Girni Kamgar Mahamandal was founded in 1923 by AA Alve and GR Kasle in Mumbai. This emerged as Girni Kamgar Union in 1928 under the communists.