 After the Federal Assault Weapons Ban expired on September 13, 2004 in the United States, the Mexican President Calderon Hinojosa decided to use brute force to combat some drug lords and in 2007 started a major escalation on the Mexican Drug War.Mexican drug lords found it easy to buy assault weapons in the United States.The result is that drug cartels have now both more gun power, and more manpower due to the high unemployment in Mexico.