President Lázaro Cárdenas is credited with revitalizing land reform, along with other measures in keeping with the rhetoric of the Revolution. Although he was from the southern state of Michoacan, Cárdenas was part of the northern Constitutionalist revolutionary forces that emerged victorious during the Revolution. He did not join with the forces of Emiliano Zapata or Pancho Villa, who advocated sweeping land reform. Cárdenas distributed most land between 1936 and 1938, after he had ousted Calles and took full control of the government and before his expropriation of foreign oil companies in 1938. He was determined to distribute land to the peasantry, but also keep control of the process rather than have peasants seize land. His most prominent expropriation of land was in the Comarca Lagunera, with rich, irrigated soil. Some 448,000 hectares of land there were expropriated in 1936, of which 150,000 were irrigated. he directed similar expropriations in Yucatán and the Yaqui valley in 1937; Lombardía and Nueva Italia, Michoacan; Los Mochis, Sinaloa; and Soconusco Chiapas in 1938. Rather than dividing land into individual ejidos, which peasants preferred and on which they pursued subsistence agriculture, Cárdenas created collective ejidos. Communities were awarded land but they were worked as a single unit. This was done for lands producing commercial crops such as cotton, wheat, henequen, rice, sugar, citrus, and cattle, so that they would continue to be commercially viable for the domestic and export markets. Collective ejidos received more government support than individual ejidos.