The soldiers who walked into what looked like a tomato field in the desert near El Rosario, Baja California, on 12 July 2011 found about 120 hectares of marijuana instead.[1] The plot covered nearly 300 acres more than 150 miles south of Tijuana, and the army presented it as the largest marijuana plantation ever detected in Mexico.[1][2]

About 100 laborers were eating dinner when the patrol of some 30 soldiers arrived, and they fled into the hills.[1] The military captured two people in the field and detained another 56 at checkpoints set up around the area.[1] Brigadier General Alfonso Duarte Mugica, who oversaw the operation, said the crop could have yielded about 120 tons of marijuana worth about $160 million, and the defense ministry attributed the plantation to Joaquin Guzman and the Sinaloa cartel.[1][2]

Some 200 soldiers began burning the plants, work the authorities said could take a month, and boxes of highly toxic fertilizer were found at the site.[1] President Felipe Calderon congratulated the defense ministry, calling the find a big blow to organized crime.[1]