June 16, 1955, the Argentine Navy, supported by members of the Army and the Argentine Air Force rebelled against the Government of Juan Perón, in what is known as the Revolución Libertadora. Therefore, the Uruguayan Military Air Force had to change its operational routine according to orders issued by the Executive branch, in order to maintain air surveillance in the event of any violation of Uruguayan sovereignty by Argentine forces. That same day, F-51Ds and B-25Js were fully armed, and around 16:00 local time a first order was given for two F-51s to scramble to Colonia, and a B-25 to the north coast. On September 17, 1955, a section of two F-51 crewed by 1st Lt. Walter Samarello and Lt. 2nd Miguel Lagrotta, who were on a reconnaissance mission, sighted two Argentine warships. These ships appeared in a visual aid that had been delivered to all the pilots of the Aviation Group No. 2, which contained the profiles of the ships of the Argentine fleet. When sighted, the ships fired several bursts of anti-aircraft fire, and Lieutenant Samarello decided to shelter the section among the clouds. The Argentine crew, upon noticing the error and realizing that they were firing at Uruguayan planes, communicated over radio to an Air Force station in Cerrito de la Victoria, Montevideo, a request to not be flown over to avoid confusion, specially after one of these rebel ships had already been attacked by Argentine Air Force pilots loyal to Perón. Jet Age In 1956 the Military Air Force was, for the first time, referred to as the Uruguayan Air Force, and thus it could be considered that from this point forward this name began being used. One of the first milestones of the Uruguayan Air Force was also in 1956, when as a result of the Army and later Air Force capability of sustaining a high level of flight training with its F-51D aircraft, flying over 4,000 hours in one year and through the help of the Military Assistance Program, the Aviation Group No. 2 (Fighters) (Grupo de Aviación N.° 2 (Caza)) received its first jet aircraft, four Lockheed T-33A-5-LO that arrived at the Carrasco International Airport on October 23, 1956, beginning the jet age in Uruguay. The flight training that the United States Air Force (USAF) pilots gave in these new jet aircraft was fundamental for the Air Force, and not only veteran but