Original: Hitler's further travel through Austria changed into a triumphal tour that climaxed in Vienna, on 2 April 1938, when around 200,000 Austrians gathered on the Heldenplatz (Square of Heroes) to hear Hitler proclaim the Austrian Anschluss.
Simplified: On 2 April 1938 200,000 Austrians gathered on the Heldenplatz (Square of Heroes) to hear Hitler proclaim the Austrian Anschluss.