On March 7, 1936, German troops marched into the Rhineland, a region of Germany that had been demilitarized after World War I. This was a pivotal moment in the lead-up to World War II.

Here is an analysis of why this happened and the consequences that followed.

Why did Germany Remilitarize the Rhineland?

Hitler’s decision was a combination of strategic necessity, political ideology, and opportunism.

1. Reclaiming Sovereignty and National Pride
* Breaking the “Shackles of Versailles”: Under the Treaty of Versailles (1919), Germany was forbidden from stationing troops or building fortifications in the Rhineland (the area bordering France, Belgium, and the Netherlands). Hitler viewed this as a national humiliation and a violation of German sovereignty.
* Domestic Popularity: Reclaiming this territory was a surefire way to boost his popularity at home. It signaled to the German people that Germany was once again a great power that did not need to bow to foreign demands.

2. Strategic Security (The “Open Door” Problem)
* Closing the West: As long as the Rhineland was demilitarized, the French army could march into the German industrial heartland (the Ruhr) unopposed at any time. This vulnerability made it impossible for Germany to fight a war in the East (e.g., against Poland or Czechoslovakia) without leaving its rear completely exposed to France.
* Fortification: Hitler needed to remilitarize the area to build the Siegfried Line (Westwall), a line of fortifications that would block a French invasion.

3. The Diplomatic Pretext
* The Franco-Soviet Pact: In 1935, France signed a mutual assistance treaty with the Soviet Union. Hitler used this as his diplomatic excuse, claiming that this alliance was a hostile move of “encirclement” against Germany and a violation of the Locarno Treaties (which had guaranteed the western borders). He argued that since France had arguably violated Locarno, Germany was no longer bound by it.
4. Testing the Waters (The Gamble)
* Hitler admitted later that the 48 hours after the march were the “most nerve-racking in my life.” The German army was still weak compared to the French army. If France had marched to oppose them, the Germans would have had to retreat in humiliation. Hitler was testing the resolve of Britain and France to see if they would actually enforce the treaties.

What were the Consequences?
The remilitarization is often cited by historians as the last easy opportunity to stop Hitler. The lack of response changed the course of history.

1. A Shift in the Balance of Power
* Germany Secured its Rear: By fortifying the Rhineland, Germany effectively neutralized the French threat. This meant France could no longer easily threaten Germany with invasion if Germany attacked its Eastern neighbors.
* Eastern Allies Abandoned: Countries like Poland and Czechoslovakia, which had alliances with France, realized that France could no longer effectively come to their aid. The balance of power swung decisively in Germany’s favor.

2. The Failure of Appeasement Exposed
* Weakness of the Allies: Britain and France did nothing but issue diplomatic protests. Britain, in particular, felt that the Treaty of Versailles had been too harsh and that Germany was merely “walking into its own backyard.”
* Hitler Emboldened: The lack of resistance convinced Hitler that the Western democracies were weak and indecisive. This success encouraged him to take further risks, leading directly to the annexation of Austria (Anschluss) in 1938 and the demand for the Sudetenland.

3. The End of the Post-War Order
* Death of the League of Nations: The League’s inability to act against a clear treaty violation proved it was effectively powerless to stop aggression.
* Locarno Pact Destroyed: The Locarno Treaties, which were supposed to guarantee peace in Western Europe, were effectively null and void.

4. Acceleration toward War
* With the western border secure, Hitler accelerated his rearmament program and began planning for expansion into Eastern Europe (Lebensraum), setting the stage for the invasion of Poland in 1939.