Marines from Lima Company, 3rd Battalion, 25th Marine Regiment, 4th Marine Division, Marine Forces Reserve in support of Special Purpose Marine Air-Ground Task Force UNITAS LXIII, conduct Military Operations in Urban Terrain (MOUT) training with Brazilian Marines at Ilha do Governador, Rio de Janeiro, Sept. 7, 2022. The training phase of exercise UNITAS integrates partner nations in various military events to exchange information on best practices and enhance interoperability of the multinational force. UNITAS is the world’s longest-running annual multinational maritime exercise that focuses on enhancing interoperability among multiple nations and joint forces during littoral and amphibious operations in order to build on existing regional partnerships and create new enduring relationships that promote peace, stability, and prosperity in the U.S. Southern Command’s area of responsibility. (U.S. Marine Corps photo by Maj. Jeremy Wheeler)