Adolf Hitler and Benito Mussolini meet at Hitler's Berchtesgaden home in 1942

The transcript describes the initial optimism during the early years of the war, where successes on all fronts led to a sense of triumph among the dictators. However, an early meeting at Hypers purchase Garden retreat turned out to be a premature victory celebration, indicating that the optimism might have been misplaced.

What does the phrase 'the world was their oyster' imply about the people's mindset?

What does the text suggest about the nature of the victories celebrated?