World War, 1914-1918; France; World War, 1914-1918; Germany; Prisoners of War; World War, 1914-1918; Trench warfare; World War, 1914-1918; Medical care; World War, 1914-1918; Transportation; Missing in action; World War, 1914-1918; Maps; Barracks; Vaccination; World War, 1914-1918; Prisoners and prisons, German