Jodl was chosen by Hitler to be Chief of Operation Staff of the newly formed Oberkommando der Wehrmacht (OKW) on 23 August 1939, just prior to the German invasion of Poland. Jodl acted as a chief of staff during the invasion of Denmark and Norway. Following the Fall of France, Jodl was optimistic of Germany's success over Britain, writing on 30 June 1940 that "The final German victory over England is now only a question of time."