German rearmament was a policy and practice of rearmament carried out by Germany from 1918 to 1939, in violation of the Treaty of Versailles which required German disarmament after WWI to prevent it starting another war. It began on a small, secret, and informal basis shortly after the treaty was signed, but was openly and massively expanded after the Nazi Party came to power in 1933.

Carl von Ossietzky was a German journalist and pacifist. He was the recipient of the 1935 Nobel Peace Prize for his work in exposing the clandestine German rearmament.