The Brazilian Air Force (, 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 (Flightglobal.com) 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. History Contestado Campaign The Contestado War was the first conflict in which Brazilian military aviation was employed. On September 19, 1914, taking advantage of a special train driving troops, three aircraft were boarded: a Morane-Saulnier biplane, a Morane-Saulnier monoplane and a Blitzer SIT biplane. The train continued from Rio de Janeiro passing through São Paulo where it would reach the São Paulo – Rio Grande railway to the station of União da Vitória. Along the way, sparks shot through the locomotive, hitting a gallon of gasoline in one of the wagons carrying the dismantled aircraft. The fire spread, much like the planes. After the crash, only the Morane-Saulnier remained in flying condition. In the conflict zone, he coordinated the construction of runways and hangars to be used in União da Vitória, Canoinhas and Rio Negro. Then, two Morane-Saulnier and special ammunition were brought from Rio de Janeiro, as well as a mechanic. The first aerial activity occurred only on January 4, 1915, when a training flight followed the course of the Iguaçú River to the Timbo River. The first official mission took place on January 19 and the duration of the flight was just over an hour. The following week, on February 25, 1915, a Morane-Saulnier had an accident. During a test flight in the vicinity of the field, the engine stopped and aircraft crashed with total loss, pilot survived. March 1, 1915 was the scheduled date for a heavy attack on the rebels. The mission was to fly over the Valley of Santa Maria, to launch bombs on the rebels' stronghold, and to observe and direct the shots of the artillery and the advance of the infantry. Two Morane-Saulnier aircraft took off, but