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Pig War

Proposed boundaries:

Through Haro Strait, favored by the US

Through Rosario Strait, favored by Britain

Through San Juan Channel, compromise proposal

The lines are as shown on maps of the time. The modern boundary follows straight line segments and roughly follows the blue line. The modern eastern boundary of San Juan County roughly follows the red line.

Date	June 15 – October 1859 (troops stationed on San Juan Island until 1874)
Location	San Juan Islands
Result	Bloodless war – San Juan Islands awarded to the United States following third-party arbitration.

Belligerents

United States

Washington Territory

United Kingdom

Colony of Vancouver Island

Commanders and leaders

Colonel Silas Casey, Captain George Pickett

Rear Admiral R. L. Baynes

Strength

461 combatants, 14 cannons

2,140 combatants; 5 warships mounting 70 cannons