Assault Amphibian Vehicles from Marine Forces Unitas make their way through the desert in Cifuncho, Chile, Sept. 29, during a bilateral exercise with the Chilean Marine Corps, as part of the amphibious phase of Unitas 43-02. During the course of the bilat exercise, which ran from Sept. 27-30, U.S. and Chilean Marines trained aboard each other's naval vessels including the USS Portland (LSD-37), and the Chilean tank landing ship the Valdivia. From both ships, the two nations launched and amphibious assault and then conducted offensive and defensive operations ashore.  USMC photo by Staff Sgt. Sam Kille, MARFOR UNITAS PAO.