A bloodless 1859 border dispute between the US and UK over the San Juan Islands, resolved without human casualties despite military deployments.
Key Facts
- Year
- 1859
- Human casualties
- 0
- Trigger
- Shooting of a pig
- Disputed territory
- San Juan Islands
- Parties involved
- United States and United Kingdom
Location
Cause → Event → Consequence
The United States and United Kingdom disputed the border in the San Juan Islands, located between Vancouver Island and Washington Territory. The ambiguity of the 1846 Oregon Treaty left sovereignty over the islands unresolved, creating ongoing tension between American settlers and British authorities in the region.
The confrontation began when an American settler shot a pig belonging to the Hudson's Bay Company in 1859. The incident escalated into a military standoff, with both American and British forces deploying troops and warships to the islands, though neither side opened fire on the other.
Despite the tense military standoff, no human lives were lost on either side. The dispute led to a joint military occupation of San Juan Island by both nations, a situation that persisted until the boundary was formally arbitrated and resolved in 1872 in favor of the United States.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Side B
1 belligerent