The revolutionary process continued. On 11 March 1975, the left-wing military forces defeated a coup attempt by rightists in the military. This resulted in a turn in the revolutionary process to the political left, with the main sectors of the economy, such as the banks, transportation, steel mills, mines, and communications companies, being nationalized. This was done under the lead of Vasco Gonçalves, a member of the military wing who supported the party and who had become prime minister after the first provisional government resigned. The party then asserted its complete support for these changes and for the Agrarian Reform process that implemented collectivization of the agricultural sector and the land in a region named the "Zone of Intervention of the Agrarian Reform" or "ZIRA", which included the land south of the Tagus River. The PCP took the lead of that process and drove it according to the party's program, organizing thousands of peasants into cooperatives. Combined with the party's strong clandestine organization and support of the peasants' movement during the preceding years in that region, these efforts made the south of Portugal the major stronghold of the PCP. The party gained more than half of the votes in Beja, Évora, and Setúbal in subsequent elections.