 The UGT grew from 277,011 in December 1930, to 958,451 in December 1931, to 1,041,539 in June 1932.Much of this growth occurred in its land workers' federation, the "Federación Nacional de Trabajadores de la Tierra" (FNTT), which grew from 36,639 in June 1930 to 392,953 in June 1932, raising the proportion of land workers in the UGT from 13 percent to 37 percent.The influx of these workers ("jornaleros") caused the union's radicalisation, and the bloody breakout of the Spanish Civil War deepened the internal fissures that resulted in the departure of Largo Caballero from the position of UGT secretary general in 1937.