Some moved eastward into the hills, where they cleared forests in order to plant crops. Soil erosion forced them, however, to abandon their land and move deeper into the rainforest. Cattle ranchers then claimed the abandoned land. Peasants and ranchers continued this movement deep into the rain forest. By the early 1970s, Nicaragua had become the United States' top beef supplier. The beef supported fast-food chains and pet food production. President Anastasio Somoza Debayle owned the largest slaughterhouse in Nicaragua, as well as six meat-packing plants in Miami, Florida.