Mexican troops during a gun battle in Apatzingan, Michoacán.

“Operation Michoacán is a joint operation by Federal, Police, and The Mexican Military, under the supervision of The Secretary of Public Safety, Attorney General of Mexico (PGR), Secretary of the Interior, Mexican Navy, and Mexican Army.

Initiated on December 11, 2006, to eliminate drug plantations and to combat drug trafficking. In some occasions state and municipal police have participated despite not being part of it.The joint operation has distinguished itself as one of the operations against organized crime, drug trafficking in this case, which has employed the largest number of military and police elements, as well as most state forces.”

http://www.borderlandbeat.com/2010/07/operation-michoacan.html