["History \/ Military \/ Naval","History \/ Military \/ World War I","World War, 1914-1918;Naval operations, German.","World War, 1914-1918;Personal narratives, German.","History \/ Military \/ Naval","History \/ Military \/ World War I","World War, 1914-1918;Naval operations, German.","World War, 1914-1918;Personal narratives, German."]