Fall Grün (Czechoslovakia)

Fall Grün ("Case Green") was a pre-World War II German plan for an aggressive war against Czechoslovakia. The plan was first drafted late in 1937, then revised as the military situation and requirements changed. The ultimate revision of the plan scheduled the attack for September 28, 1938; but, as France and the United Kingdom were reluctant to go to war for the sake of Czechoslovakia and expressed political will to avoid such a war at all costs, the execution of the plan was postponed, then, after the Munich Conference (also called the Treaty of Munich) held on September 30, 1938, abandoned altogether.

In ceding the Sudetenland to Germany, Czechoslovakia lost the majority of its border fortifications and was no longer defensible against the German military. Germany invaded Czechoslovakia on March 15, 1939 (Unternehmen Südost or Operation Southeast), encountered minimal resistance, and annexed Bohemia and Moravia to the Reich; Germany gave nominal independence to Slovakia and installed Jozef Tiso as head of a satellite state.

Fall Grün was later assigned to the plans for an invasion of Ireland.