A Humvee serves as the command-and-control area for a mechanized assault course during Integrated Training Exercise 4-19 at Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., June 12, 2019. Today’s Marine Reserve is a critical component of the Marine Corps’ Total Force, and training like ITX helps ensure Reserve units combat effectiveness and proficiency for world-wide deployment. (U.S. Marine Corps photo by Lance Cpl. Preston L. Morris)