Jimmy Hoffa a result of Hoffa's work with other union leaders to consolidate local union trucker groups into regional sections, and then into a national body — work that Hoffa ultimately completed over a period of two decades — membership grew to 170,000 members by 1936. Three years later, there were 420,000. The number grew steadily during World War II and through the post-war boom to top a million members by 1951. The Teamsters organized truck drivers and warehousemen, first throughout the Midwest, then nationwide. Hoffa played a major role in the union's skillful use of "quickie strikes", secondary boycotts, and other
African Trade Union Congress Following the split in the African nationalist movement in 1963, which led to the separation of the Zimbabwe African National Union (ZANU) from the Zimbabwe African People's Union (ZAPU), the ATUC became aligned with ZANU. The ATUC was affiliated with the African Trade Union Confederation. The ATUC was reported to have nine affiliated unions during the mid-1960s, with a total membership of 29,198 (36% of all trade union members in the country). The largest single affiliated union was the Railway African Workers' Union (RAWU), which had approximately 16,000 members. In 1981 ATUC merged into the Zimbabwe Congress of Trade Unions.