Mexican response to Hurricane Katrina

In September 2005, units of the Mexican Armed Forces responded to the emergency situations after Hurricane Katrina with aid and assistance, appearing as a flagged, uniformed force in the United States for the first time since World War II in the 1940s and the first operational deployment of Mexican troops to the U.S. in 159 years. The Mexican contingent was based out of Kelly Air Force Base in San Antonio, Texas for the duration of the deployment.

Source: Wikipedia — Mexican response to Hurricane Katrina (CC BY-SA 4.0)