1859
The Pig War between Canada and the USA
The Oregon Treaty of 1846 had settled the boundary between British North America (later to be Canada) and the United States from the prairies to the Pacific along the 49th parallel. Things got a bit tricky however in the waters between the mainland and Vancouver Island — the Island, occupied by the British, dips below the parallel. Unfortunately, ambiguity in the language of the treaty resulted in rival claims to the San Juan Islands. An online article by Tod Matthews takes up the story:
Before the Pig War, the British were determined to resist the tide of American migration sweeping across the Rocky Mountains. They argued that the Americans were trespassing on land guaranteed to Britain by earlier treaties and explorations and through trading activities of the long-established Hudson’s Bay Company. Americans considered the British presence an affront to their “manifest destiny to overspread the continent” and rejected the idea that the land west of the Rockies should remain under foreign influence. The Oregon Treaty of 1846 gave the United States undisputed possession of the Pacific Northwest south of the 49th parallel, extending the boundary “to the middle of the channel which separates the continent from Vancouver’s Island; and thence southerly through the middle of the said channel, and of Fuca’s straits to the Pacific Ocean.” However, the treaty created additional problems because its wording left unclear who owned San Juan Island. The difficulty arose over that portion of the boundary described as the “middle of the channel” separating British-owned Vancouver Island from the mainland. Actually, there were two channels: Haro Strait (nearest Vancouver Island) and Rosario Strait (nearer the mainland). San Juan Island lay between the two. Britain insisted that the boundary ran through Rosario Strait; the Americans claimed it lay through Haro Strait. Thus, both sides considered San Juan theirs for settlement.
By 1859, there were about 25 American settlers on San Juan Island. They were settled on redemption claims which they expected the U.S. Government to recognize as valid but which the British considered illegal. Neither side recognized the authority of the other. Amazingly, this conflict occurred on an island only 20 miles long and seven miles wide, covering 55 square miles
When American settler Lyman Cutlar shot and killed the Hudson’s Bay Company’s marauding pig, the feud between nation’s came to blows. British authorities threatened to arrest him. American citizens requested military protection. Brig. Gen. William S. Harney, the commander of the Department of Oregon and anti-British to boot, responded by sending a company of the 9th U.S. Infantry under Capt. George E. Pickett to San Juan. James Douglas, governor of the Crown Colony of British Columbia, was angered at the presence of American soldiers on San Juan. He had three British warships under Capt. Geoffrey Hornby sent to dislodge Pickett but with instructions to avoid an armed clash if possible. By August 1861, five British warships mounting 167 guns and carrying 2,140 troops opposed 461 Americans, protected by an earthen redoubt and 14 cannons. When word of the crisis reached Washington, officials there were shocked that the simple action of an irate farmer had grown into an explosive international incident. San Juan Island remained under joint military occupation for the next 12 years. In 1871, when Great Britain and the United States signed the Treaty of Washington, the San Juan question was referred to Kaiser Wilhelm I of Germany for settlement. On October 21, 1872, the emperor ruled in favor of the United States, establishing the boundary line through Haro Strait. Thus San Juan became an American possession and the final boundary between Canada and the United States was set. On November 25, 1872, the Royal Marines withdrew from English Camp. By July 1874 the last of the U.S. troops had left American Camp. Peace had finally come to the 49th parallel.