The Brazilian Armed Forces (Portuguese: Forças Armadas Brasileiras, IPA: [ˈfoʁsɐz ɐʁˈmadɐz bɾaziˈlejɾɐs]) are the unified military forces of the Federative Republic of Brazil. Consisting of three service branches, it comprises the Brazilian Army (including the Brazilian Army Aviation), the Brazilian Navy (including the Brazilian Marine Corps and Brazilian Naval Aviation) and the Brazilian Air Force (including the Aerospace Operations Command).

Brazil's armed forces are the second largest in the Americas, after the United States, and the largest in Latin America and the Southern Hemisphere by the level of military equipment, with 334,500 active-duty troops and officers. Brazilian soldiers were in Haiti from 2004 until 2017, leading the United Nations Stabilization Mission (MINUSTAH).

Brazilian Army (Exército Brasileiro)
https://en.wikipedia.org/wiki/Brazilian_Army
The Brazilian Army (Portuguese: Exército Brasileiro; EB) is the branch of the Brazilian Armed Forces responsible, externally, for defending the country in eminently terrestrial operations and, internally, for guaranteeing law, order and the constitutional branches, subordinating itself, in the Federal Government's structure, to the Ministry of Defense, alongside the Brazilian Navy and Air Force. The Military Police (Polícias Militares; PMs) and Military Firefighters Corps (Corpos de Bombeiros Militares; CBMs) are legally designated as reserve and auxiliary forces to the army. Its operational arm is called Land Force. It is the largest army in South America and the largest branch of the Armed Forces of Brazil.

Emerging from the defense forces of the Portuguese Empire in Colonial Brazil as the Imperial Brazilian Army, its two main conventional warfare experiences were the Paraguayan War and the Brazilian Expeditionary Force, and its traditional rival in planning, until the 1990s, was Argentina, but the army also has many peacekeeping operations abroad and internal operations in Brazil. The Brazilian Army was directly responsible for the Proclamation of the Republic and gradually increased its capacity for political action, culminating in the military dictatorship of 1964–1985. Throughout Brazilian history, it safeguarded central authority against separatism and regionalism, intervened where unresolved social issues became violent and filled gaps left by other State institutions.

Changes in military doctrine, personnel, organization and equipment mark the history of the army, with the current phase, since 2010, known as the Army Transformation Process. Its presence strategy extends it throughout Brazil's territory, and the institution considers itself the only guarantee of Brazilianness in the most distant regions of the country. There are specialized forces for different terrains (jungle, mountain, Pantanal, Caatinga and urban) and rapid deployment forces (Army Aviation, Special Operations Command and parachute and airmobile brigades). The armored and mechanized forces, concentrated in Southern Brazil, are the most numerous on the continent, but include many vehicles nearing the end of their life cycle. The basic combined arms unit is the brigade.

Conventional military organizations train corporals and reservist soldiers through mandatory military service. There is a broad system of instruction, education and research, with the Military Academy of Agulhas Negras (Academia Militar das Agulhas Negras; AMAN) responsible for training the institution's leading elements: officers of infantry, cavalry, engineering, artillery and communications, the Quartermaster Service and the Ordnance Board. This system and the army's own health, housing and religious assistance services, are mechanisms through which it seeks to maintain its distinction from the rest of society.

Brazilian Air Force (Força Aérea Brasileira)
https://en.wikipedia.org/wiki/Brazilian_Air_Force
The Brazilian Air Force (Portuguese: Força Aérea Brasileira, FAB) is the air branch of the Brazilian Armed Forces and one of the three national uniformed services. The FAB was formed when the Army and Navy air branches were merged into a single military force initially called "National Air Forces" in 1941. Both air branches transferred their equipments, installations and personnel to the new force.

According to Flight International and the International Institute for Strategic Studies, the Brazilian Air Force has an active strength of 80,937 military personnel and operates around 715 aircraft. The Brazilian Air Force is the largest air force in the Southern Hemisphere and the second largest in the Americas after the United States Air Force.

Brazilian Navy (Marinha do Brasil)
https://en.wikipedia.org/wiki/Brazilian_Navy
The Brazilian Navy (Portuguese: Marinha do Brasil, lit. 'Navy of Brazil') is the naval service branch of the Brazilian Armed Forces, responsible for conducting naval operations.

The navy was involved in Brazil's war of independence from Portugal. Most of Portugal's naval forces and bases in South America were transferred to the newly independent country. The government maintained a sizeable naval force in the initial decades following independence. The navy was later involved in the Cisplatine War, the River Plate conflicts, the Paraguayan War as well as other sporadic rebellions that marked Brazilian history.

By the 1880s, the Brazilian Imperial Navy was the most powerful in South America. After the 1893–1894 naval rebellion, there was a hiatus in the development of the navy until 1905, when Brazil acquired two of the most powerful and advanced dreadnoughts of the day which sparked a dreadnought race with Brazil's South American neighbours. The Brazilian Navy participated in both World War I and World War II, engaging in anti-submarine patrols in the Atlantic.

The modern Brazilian Navy includes British-built guided missile frigates (FFG), locally built corvettes (FFL), coastal diesel-electric submarines (SSK), and many other river and coastal patrol craft.