What has to change for the European war to be delayed?

Did Britain force the European war to begin in 1939?

The reply points to Germany's invasion of Poland and the German-Soviet agreement; a delayed-war scenario must change those events.

The counterfactual cannot preserve the invasion unchanged and assume that war simply waits until 1942. The German-Soviet division of Poland is part of the historical starting point. A later reply also distinguishes the European outbreak from the fighting already underway in China. The scenario therefore alters a particular sequence of escalation, rather than declaring that the whole world remained at peace.