How a Pig Almost Started a War: The Bizarre Tale of the San Juan Islands

On June fifteenth, 1859, an American farmer shot a pig. This single act of porcine pest control nearly ignited a full-blown war between the United States and the British Empire. It’s a stark reminder that sometimes the biggest historical tipping points aren't a two-thousand-year-old computer like the Antikythera Mechanism we explored last time, but something far, far dumber. This whole mess—known today as the Pig War—unfolded in the San Juan Islands, right off the coast of Washington state. So here’s the setup. The Oregon Treaty of 1846 was supposed to settle the border between the US and British North America, which is now Canada.

The treaty drew the line through "the middle of the channel which separates the continent from Vancouver's Island." Simple enough, right? Except there are two channels. The Haro Strait and the Rosario Strait. And sitting right between them are the San Juan Islands. So naturally, both the Americans and the British claimed them. For about a decade, it was a tense but mostly peaceful co-existence. American farmers started settling on San Juan Island, and so did Britain’s Hudson's Bay Company, which set up a sheep ranch.

You had two groups of people, loyal to two different flags, living on the exact same piece of land, both absolutely convinced it was theirs. It was a powder keg waiting for a spark. And that spark was a pig. A large black boar, owned by the Hudson's Bay Company, had a bad habit of rooting around in the potato patch of an American farmer named Lyman Cutlar. On that June morning, Cutlar had had enough. He took out his gun, and he shot the pig. Now, this is where things get almost comical in their escalation. Cutlar went to the pig's owner, an Irishman named Charles Griffin, and offered to pay for it.

He offered ten dollars. Griffin demanded one hundred dollars. Cutlar said the pig was eating his potatoes and that he wouldn't pay a cent more. So the British authorities threatened to arrest Cutlar. The American settlers, now genuinely scared of being hauled off by the British, called for military protection from the U.S. government. And the government sent it. They sent Captain George Pickett—yes, that George Pickett, the one who would later lead the disastrous Pickett's Charge at Gettysburg—with sixty-six American soldiers.

He landed on the island and declared it fully U.S. property. The British response? They sent warships. Three of them, carrying over two thousand men and more than seventy cannons, all aimed at Pickett's tiny camp. Within weeks, a squabble over a dead pig and some potatoes had turned into a naval standoff between two of the world's most powerful nations. Where have we seen this before? It’s the exact shape of a modern social media dogpile, or a corporate hostile takeover. It starts with one small, almost trivial offense—a perceived slight, a lowball offer.

Then the proxies get involved. The original issue is completely forgotten. It becomes about dominance, about not backing down, about saving face. The pig was the initial insult. The warships were the armies of lawyers and PR firms descending. The logic is identical: you escalate to show you can’t be pushed around. But here’s the turn. Here’s where the nineteenth century maybe handled things better than we do. News traveled slow. By the time word of this standoff reached Washington D.C. and London, officials were horrified.

President James Buchanan and the British leadership had absolutely no appetite for a war over an island most of them couldn't find on a map. They immediately dispatched top negotiators to cool things down. The Americans sent General Winfield Scott, a respected veteran. He met with the British governor and, instead of posturing, they talked. They agreed that this was all, quote, "a foolish affair" and worked out a deal for a joint military occupation. Both sides would leave no more than one hundred men on the island until the diplomats could sort out the border for good.

That joint occupation lasted for twelve years. For twelve years, British and American soldiers lived together on San Juan Island, reportedly getting along great—holding joint holiday celebrations and horse races. The whole dispute was finally settled in 1872 by international arbitration, overseen by Kaiser Wilhelm the First of Germany, who sided with the Americans. The Pig War ended without a single human casualty. The only victim was the pig. It’s a story about how easily absurdity can lead to the brink of catastrophe.

But more than that, it’s a story about choosing to step back. The most important decision wasn't made by the man with the gun, but by the leaders thousands of miles away who decided that going to war over a pig was, in the end, a profoundly stupid idea.