But There Was No War: The Impossibility of a United States Invasion of Canada after the Civil War

The notion that the United States threatened to invade the Canadian colonies after the Civil War persists to this day. Alleged British and Canadian support for the Confederate States angered Washington so much that Canadians feared military action. This menace started the Confederation movement that created the Dominion in 1867. This article argues otherwise by pointing to the careful diplomacy during the war—and rapid changes afterwards—each worked against the threat of a war. Tensions rose and fell with events such as the Trent Affair of 1861 and the St. Albans Raid of 1864, but each country otherwise sought to avoid trouble. Neither side deployed troops to the border during the war. After Appomattox, Union soldiers headed north but only to return home. Demobilization, combined with military deployments to the former Confederacy and the West, and resolute diplomacy afterwards, further prevented conflict. Not even the Fenian raids of 1866 and 1870 could disturb the peace.