Question

which of the following was hitler’s first violation of the treaty of versailles?
the german invasion of poland
the german invasion of czechoslovakia
the german invasion of the rhineland
the german invasion of manchuria

Explanation:

The Treaty of Versailles restricted Germany from militarizing the Rhineland. Hitler sent troops there in 1936, which was his first direct violation of the treaty. The invasion of Poland (1939) and Czechoslovakia (1938) happened later, and the invasion of Manchuria was carried out by Japan, not Germany.

Answer:

the German invasion of the Rhineland