In 1859, a single pig turned a quiet island dispute into a tense confrontation between two powerful nations. What began as a farmer’s frustration over a wandering animal on San Juan Island quickly escalated into a military standoff involving British warships, American soldiers and competing territorial claims. The disagreement was rooted in a much older problem; an unclear boundary created by the 1846 Oregon Treaty. As tensions mounted, both sides reinforced their positions, raising fears that a seemingly trivial incident could spark an international conflict. For 12 years, Britain and the United States maintained rival camps on the island but avoided open conflict. Known as the Pig War, the unusual crisis was eventually resolved through diplomacy and arbitration, leaving behind one of history’s strangest border disputes.
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