Germany was divided in the past in East (GDR) and West (GER), Berlin was divided in 4 sectors: in the west the American, the British and the French sector – in the east there was the Soviet sector.
With ref. to the erection of the (erected in 1961 by the East Germans, GDR) President of United States of America, John F. Kennedy ordered to install three checkpoints (gates) at various places in the wall. The reason was – by international contracts – to keep the allied rights to act in all four sectors by allied troups and diplomatic corps entering and leaving West Berlin. Checkpoint Charlie became the most welknown checkpoint of all. But why named Checkpoint Charlie?
Spelling words we are using the American alphabet this way: alpha, bravo, charlie – a, b, c – checkpoint alpha, checkpoint bravo, the third checkpoint was named CHECKPOINT CHARLIE and became this way the most famous checkpoint in Berlin.
Visiting West-Berlin on June 26, 1963, U.S. President John F. Kennedy delivered his important speech to boost People of free Berlin (and American Soldiers in Berlin too):"Ich bin ein Berliner" ("I am a Berliner").