A European war delayed to 1942

When might the Second World War have begun if Germany had not started it in 1939?

The likeliest European crisis point is 1942, although Japan might still begin its own war in 1941 while a European conflict takes longer to ignite.

The most dangerous point is 1942 because several powers would be better prepared by then. Delaying Germany does not automatically delay Japan, which could still choose war in 1941. The result could be a Pacific conflict beginning on the historical schedule while the European war starts later and under different readiness conditions.