Which event symbolizes the beginnings of German rearmament prior to World War II?

The reoccupation of the Rhineland in 1936 is widely regarded as a significant event that symbolizes the beginnings of German rearmament prior to World War II. This move represented a clear violation of the Treaty of Versailles, which had demilitarized the region after World War I to serve as a buffer zone between Germany and France. By sending German troops into the Rhineland, Adolf Hitler not only defied international agreements but also tested the resolve of France and other European powers. The lack of immediate military response from France and Britain emboldened Hitler and marked a turning point where rearmament efforts intensified. The event was crucial in restoring German military strength and confidence, setting the stage for further aggressive expansion in Europe.

The other events listed do not specifically symbolize the beginning of rearmament in the same way. The invasion of Poland marks the start of World War II, the Munich Agreement was a failed attempt at appeasement regarding Sudetenland, and the establishment of the Axis Powers came later, focusing on alliances rather than the initial militarization of Germany.