In order to justify its remilitarization—which was also a violation of the 1925 Locarno Pact—a "post hoc" referendum was quickly called by Hitler for March 29 to "ask the German people" to both ratify the Rhineland's occupation by the German Army, and to approve a single party list composed exclusively of Nazi candidates to sit in the new Reichstag. The "Hindenburg" and the "Graf Zeppelin" were designated by the government as a key part of the process.