Jimmy Hoffa Agreement. He played a major role in the growth and development of the union, which eventually became the largest (by membership) in the United States with over 2.3 million members at its peak, during his terms as its leader. Hoffa became involved with organized crime from the early years of his Teamsters work, and this connection continued until his disappearance in 1975. He was convicted of jury tampering, attempted bribery and fraud in 1964, in two separate trials. He was imprisoned in 1967 and sentenced to 13 years. In mid-1971, he resigned as president of the union as part of
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.