Title: Operation Columba
Subjects: Communications, Great Britain. MI6, Homing pigeons, War use, World War, 1939-1945, Great Britain, Underground movements, Military intelligence, History, World war, 1939-1945, military intelligence, World war, 1939-1945, underground movements, belgium, Military Communications, War Underground movements, HISTORY / Military / World War II, HISTORY / Military / Strategy, HISTORY / Europe / Great Britain / 20th Century, World War (1939-1945) fast (OCoLC)fst01180924
Places: Belgium, Great Britain
Time periods: 20th century