Fenian raids

The Fenian raids were a series of incursions carried out by the Fenian Brotherhood, an Irish republican organization based in the United States, on military fortifications, customs posts, and other targets in Canada (called British North America until 1867) in 1866, and again from 1870 to 1871. A number of separate incursions by the Fenian Brotherhood into Canada were undertaken to bring pressure on the British government to withdraw from Ireland, although none of these raids achieved their aims. While authorities in the United States arrested the men and confiscated the arms of the Fenian Brotherhood, there was speculation that some in the U.S. government ignored the preparations undertaken by the Fenians due to anger over British assistance to the Confederacy during the American Civil War. The Fenian raids were one of the factors that led to Canadian Confederation, as the provinces united to face the threat of invasions.