Burgfrieden, or 'peace of the castle,' refers to a political truce in Germany that emerged at the beginning of World War I, where various social, political, and economic groups put aside their differences to support the war effort. This unity was characterized by a nationalistic sentiment that encouraged solidarity among workers, business owners, and political parties, emphasizing loyalty to the state over internal conflicts. It reflects the initial widespread enthusiasm and belief in the war’s purpose, as well as the desire for national unity during a time of crisis.