sentences:  Grumbach belonged to this district until 1 April 1937, when it was transferred to the Birkenfeld district in the "Regierungsbezirk" of Koblenz.In the early 1930s, the Nazi Party (NSDAP) was quite popular in Grumbach.In the 1932 Reichstag elections, 50.8% of the local votes went to Adolf Hitler’s party.