Uncover Montreal's Hidden Civil War Secrets During the American Civil War, the Confederate government’s largest foreign secret service base was in Montreal. Montreal, then the largest city in British North America, has kept secret its unique role in the American Civil War ever since. Based on original archival research, Barry Sheehy challenges core tenets of the American Civil War narrative. Discover the surprising connections between Montreal and key figures like John Wilkes Booth, Jefferson Davis, and powerful American politicians. Explore a gripping tale of espionage, political intrigue, and economic maneuvering that reveals a hidden chapter in North American history. For historians and anyone fascinated by the untold stories of the Civil War.