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Marine Corps Forces Reserve and Marine Corps Forces South


UNITAS (Latin for “UNITED”) is the oldest and largest maritime exercise in the region.  It began in 1959 as a South American and U.S. regional exercise designed to demonstrate a united stance against the spread of the Soviet Union’s influence and presence in Latin America.  The exercise continues to be the most important naval exercise in the U.S. Southern Command AOR promoting partnership and demonstrating U.S. importance and commitment to the region.



UNITAS LXIII – Women in Combat Arms
Modern successful militaries have one thing in common: each value the contributions of women in all occupational specialties. One military community seeing an increase of women within its ranks is...

UNITAS 2022: US Marine Corps Forces, South puts the Tactical Scalable Surgical System to the Test
Tucked away in the coastal jungles of southeastern Brazil, the corpsmen and medical officers with 2nd Medical Battalion, 2nd Marine Logistics Group were hard at work testing and developing an...

UNITAS Concludes After Successful Exercise
UNITAS LXIII (63), the world’s longest-running multinational maritime exercise concluded with a closing ceremony in Rio De Janeiro, Sept. 22, 2022....

U.S. Secretary of the Navy Kicks Off UNITAS LXIII in Rio De Janeiro
More than 5,500 military personnel from 19 partner nations kicked off UNITAS LXIII (63) during an opening ceremony Sept. 8, 2022....

U.S. Maritime Forces Arrive for UNITAS LXIII hosted by Brazil
Navy and Marine forces are set to arrive in Rio de Janeiro in support of UNITAS LXIII, the world’s longest-running multinational maritime exercise scheduled to take place Sept. 8-22.This year’s...

UNITAS 2022 Video Gallery
Video by Cpl. Colton Garrett
Partnership (Spanish Translation)
U.S. Marine Corps Forces, South
Oct. 19, 2022 | 1:37
U.S. Marines and Sailors with U.S. Marine Corps Forces, South trained alongside a multinational force of 18 partner nations during exercise UNITAS 63 in and around Rio de Janeiro, Sept. 8-22, 2022. Exercises like UNITAS develop and sustain relationships that improve the capacity of our reemerging and enduring maritime partners to achieve common objectives. Additionally, the military-to-military exchanges foster friendly, mutual cooperation and understanding among participating navies and marine corps. (U.S. Marine Corps video by Sgt. Colton K. Garrett)
UNITAS 2022 Photo Gallery