On 18 December 2006, Defence Minister Guillermo Galván said a military assault on marijuana farms in Michoacán had destroyed 2,116 growing operations covering 237 hectares (586 acres) in a week.[1] Soldiers and federal police found 1,795 marijuana fields covering 585 acres in the same week and arrested 45 people, including suspected leaders of the feuding cartels.[2][3]

President Felipe Calderón, who had taken office on 1 December, had sent thousands of soldiers and federal officers to his home state on 11 December to restore order and fight drug violence.[1][2] Troops backed by helicopter gunships pulled plants up by the roots and burned them; the army said the new ‘Colombian’ hybrid matured in about two months, could be planted at any time of year and survived herbicide unless taken out by the roots.[2][3]