The Cold War broke out almost immediately after the end of World War II, but it lasted seven times longer. It was fought between the world’s leading naval power (USA) and the world’s leading land power (USSR) occupying space in the heart of Eurasia. In that global conflict, in the first turbulent years, Yugoslavia went from the most loyal Soviet satellite to a reluctant Western ally that received American military aid during fifties of the XX century. The close and friendly relations that existed after the end of the Second World War between the FNRJ and the USA will very quickly give way to disagreements between the American side and the Yugoslav leadership and the NOVJ, based above all on the disputed territories where the Yugoslav army was located - around Trieste and parts of the Austrian state territory (according to the borders of 1937), due to Yugoslavia’s interference in the Greek civil war, and the trial of Draža Mihailović. Yesterday’s allies will become enemies. In such a situation, a series of serious incidents took place that further strained relations with the West (USA). In spite of the harsh notes that they sent to each other, Yugoslavia and the USA tried to maintain normal diplomatic relations during this period. However, the problem became far more complex due to the constant overflight of American planes over the territory of Yugoslavia without prior permission. The first incident since August 9, when an American plane was grounded, indicated a serious deterioration in relations between the two countries, and the shooting down of an American C-47 on August 19 would dramatically worsen those relations. Preserved records of violations of airspace show that almost daily overflights and other violations of Yugoslav air territory in this area were present until the improvement of relations with the West in the period 1949-1950. year.