U.S. Army Maj. Gen. Philip Ryan, U.S. Army South commanding general, welcomes exercise PANAMAX 2024 participants to Fort Sam Houston, Aug. 6, 2024. PANAMAX is a U.S. Southern Command-sponsored, multinational, biennial command post exercise (CPX) enabling multiple participating nations to practice interoperability and strengthen their ability to plan and execute complex multinational operations at various locations across the United States, Aug. 5-14. At Joint Base San Antonio-Fort Sam Houston, Army South is hosting 11 nations from South and Central America, as well as U.S. joint staff members, who will participate in the exercise as part of Multinational Forces South (MNFS) and the Chilean-led Combined Force Land Component Command (CFLCC).