The Pig War decided part of the boundary between these two nations.
France and Spain
United States and Canada
Honduras and Guatemala
Liechtenstein and Austria
United States and Canada. There was an ongoing dispute over the border of Washington State and British Columbia at San Juan Island. On June 15, 1859, on the island, Lyman Cutlar shot and killed a British-owned pig. There was a military build-up by both sides but the dispute was settled peaceably.