# Brazilian military training exercises > Live situation record from CLSTR: https://clstr.news/situations/brazilian-military-training-exercises > Updated: 2026-10-23T00:23:29.000Z. Sources: 8. Developments: 3. In October 2026, the Brazilian military conducted a series of large-scale training operations involving both domestic and international partners. Operation Formosa 2026 concluded in Goiás, serving as a joint exercise between the Brazilian Navy, Army, and Air Force. The 11-day mission focused on command, control, and logistics within a Cerrado environment. The exercise included 2,900 Brazilian personnel alongside troops from the United States, France, and Paraguay, with observers from various other nations. Following this, the Arandu 2026 Combined Exercise took place in Rio Grande do Sul, specifically involving the Brazilian and Argentine armies. Concluding on October 16, the week-long operation involved approximately 2,800 personnel—including 2,400 Brazilians and 400 Argentines—and over 600 vehicles. The training, which served as the live simulation phase of the 2024–2026 Arandú cycle, focused on improving operational capacity, interoperability, and integration through simulations of conventional combat. Activities included armored maneuvers, paratrooper jumps, special forces operations, and live-fire drills. The exercise utilized specialized units and advanced equipment, such as Brazilian Leopard 1A5 BR tanks, Guarani and Centauro II armored vehicles, and the Astros missile system, alongside Argentine TAM 2C-A2 tanks, Stryker 8x8 armored vehicles, and Oshkosh tactical trucks. Logistics for the Argentine deployment included rail transport from Argentina to Brazil. Training was conducted primarily at the Barão de São Borja Training Ground in Rosário do Sul, as well as in Santa Maria and Faxinal do Soturno. Air support was provided by the Brazilian Air Force's KC-390 Millennium and the Argentine Air Force's CASA C-212. ## Timeline ### 2026-10-23: Brazil and Argentina complete Arandú military exercise Brazil and Argentina concluded the Arandú military exercise in Rio Grande do Sul, involving 2,800 personnel and 600 vehicles to enhance bilateral interoperability. 2 sources. https://clstr.news/cluster/brazil-and-argentina-complete-arand-military-exercise ### 2026-10-19: Brazil and Argentina conduct Arandu 2026 military exercise Brazil and Argentina conducted the Arandu 2026 military exercise in Rio Grande do Sul, mobilizing 2,800 troops and 600 vehicles to enhance interoperability and combat readiness. 5 sources. https://clstr.news/cluster/brazil-and-argentina-conduct-arandu-2026-military-exercise ### 2026-10-05: Brazilian Armed Forces complete Operation Formosa 2026 Brazil concluded Operation Formosa 2026, a joint military exercise involving the Navy, Army, and Air Force alongside troops from the US, France, and Paraguay to enhance interoperability. 2 sources. https://clstr.news/cluster/brazilian-armed-forces-complete-operation-formosa-2026 --- Cite as: Brazilian military training exercises. CLSTR, https://clstr.news/situations/brazilian-military-training-exercises