Imagine a conflict so absurd that the only casualty was a pig. In 1859, the United States and Great Britain came within cannon fire of war over a single, ill-fated pig that wandered into a potato patch on a tiny island in the Pacific Northwest. The standoff, known as the Pig War, involved dozens of warships, hundreds of soldiers, and months of diplomatic wrangling—all because of one animal's appetite. How did a swine nearly derail the peace between two global powers?
The Accidental Border Dispute
The Pig War's roots lie in the vague wording of the Oregon Treaty of 1846, which set the U.S.-British border along the 49th parallel but left the ownership of the San Juan Islands ambiguous. Both nations claimed the archipelago, which sits in the Haro Strait between Vancouver Island and mainland Washington Territory. By 1859, around 30 American settlers and a few British Hudson's Bay Company employees lived on San Juan Island, each flying their nation's flag. Tensions simmered as both sides asserted jurisdiction, but no one expected the flashpoint to come from a pig. On June 15, 1859, an American farmer named Lyman Cutlar found a large black pig rooting in his garden, eating his potatoes. Cutlar, frustrated by repeated trespasses, shot and killed the pig—which belonged to Charles Griffin, a British employee of the Hudson's Bay Company. Griffin demanded compensation; Cutlar offered $10, but Griffin insisted on $100. When the Americans refused to pay, the British threatened to arrest Cutlar, igniting a diplomatic powder keg.
A Pig Sparks a Military Buildup
Word of the pig's death and the threatened arrest reached American Brigadier General William S. Harney, commander of the Oregon Department. A staunch expansionist, Harney saw an opportunity to assert U.S. authority. Without consulting Washington, D.C., he dispatched Captain George Pickett (later of Gettysburg fame) and 66 soldiers of the 9th U.S. Infantry to San Juan Island on July 27, 1859. Their orders: protect American settlers and prevent British arrest of Cutlar. When British Governor James Douglas learned of the American landing, he responded in kind. He sent three Royal Navy warships—HMS Tribune, HMS Satellite, and HMS Plumper—under Captain Geoffrey Phipps Hornby, who anchored in Griffin Bay and landed 400 marines. By August 10, Pickett's small force faced off against five British warships carrying 2,000 men and 167 cannons. The Americans had only 66 men and a few field guns. The British had overwhelming firepower, but Hornby was under strict orders not to fire first. For weeks, the two sides glared at each other, exchanging insults and threats, while the pig's carcass rotted in the summer heat.
The Standoff That Became a Picnic
As the military standoff dragged into August 1859, cooler heads intervened from afar. U.S. President James Buchanan, alarmed by Harney's unilateral action, dispatched General Winfield Scott, the Army's commanding general, to negotiate a truce. Scott arrived in October and met with British Rear Admiral Robert L. Baynes, who had also been sent to defuse the situation. The two men agreed to a joint military occupation of San Juan Island—a compromise that would last until a final border decision could be made. Under the terms, each nation would maintain a small garrison: the Americans at a camp on the south end (later named Camp Pickett) and the British at a camp on the north end (named Camp Royal). The soldiers, far from fighting, began to fraternize. They visited each other's camps, shared meals, and even held athletic competitions. One British officer wrote home that the 'war' had become 'a sort of picnic.' The only shots fired during the entire 12-year occupation were salutes on the Fourth of July and Queen Victoria's birthday.
Arbitration and the Final Verdict
The joint occupation lasted from 1859 until 1872, a period of peaceful coexistence that became a model for international dispute resolution. Both nations agreed to submit the boundary question to arbitration by a neutral third party: Kaiser Wilhelm I of Germany. In 1871, the Treaty of Washington formally established the arbitration process. The Kaiser appointed a three-person commission, which studied the historical claims and the geographic arguments. The Americans argued for the Haro Strait boundary, which would give them all the San Juan Islands; the British argued for the Rosario Strait boundary, which would give them the islands. On October 21, 1872, the Kaiser ruled in favor of the United States, setting the border through the Haro Strait. The San Juan Islands became American territory, and the British peacefully withdrew their garrison. The Pig War ended without a single human casualty, but the pig's death remains the only fatality of the conflict. The two camps—now part of San Juan Island National Historical Park—stand as monuments to a war that never was.
Legacy of the Pig War: Diplomacy Over Destruction
The Pig War is often dismissed as a historical oddity, but it holds profound lessons for modern diplomacy. It demonstrated that even the most trivial incident—a pig eating potatoes—can escalate into a major international crisis if communication breaks down and local commanders act without restraint. The conflict also showcased the value of arbitration and third-party mediation, a principle that would later underpin the Permanent Court of Arbitration and the United Nations. Today, the San Juan Island National Historical Park preserves the story, drawing over 300,000 visitors annually. At the American Camp, visitors can see the remains of the redoubt and the parade ground; at the British Camp, the restored blockhouse and formal English garden still stand. The pig, though long gone, is commemorated with a plaque and a statue at the site of the shooting. The Pig War reminds us that history's most consequential moments sometimes begin with the most absurd catalysts—and that peace can prevail even when warships are aimed and cannons are loaded.
- The only casualty of the Pig War was the pig itself, shot by American farmer Lyman Cutlar on June 15, 1859.
- Captain George Pickett, who commanded the American forces on San Juan Island, later became a Confederate general and led the infamous Pickett's Charge at Gettysburg in 1863.
- The joint military occupation of San Juan Island lasted 12 years, from 1859 to 1872, with soldiers from both sides regularly sharing meals and playing cricket together.
- The border dispute was settled by Kaiser Wilhelm I of Germany, who ruled in favor of the United States on October 21, 1872, setting the boundary through the Haro Strait.
- At the height of the standoff, 2,000 British sailors and marines faced off against 66 American soldiers, yet no shots were fired in anger.
Who was the neutral arbitrator that finally settled the San Juan Islands border dispute in 1872?
Frequently Asked Questions
The Pig War was triggered by the shooting of a pig owned by British employee Charles Griffin by American farmer Lyman Cutlar on June 15, 1859, after the pig repeatedly rooted in Cutlar's potato patch on San Juan Island. The underlying cause was an ambiguous border in the Oregon Treaty of 1846, which left the ownership of the San Juan Islands unresolved. When the British threatened to arrest Cutlar, the U.S. sent troops, and the British responded with warships, escalating the incident into a military standoff.
No, there were no human casualties in the Pig War. The only death was the pig itself. Despite a 12-year military occupation involving hundreds of soldiers from both sides, no shots were ever fired in anger. The conflict is often cited as a rare example of a war with zero human fatalities, resolved entirely through diplomacy and arbitration.
The active military standoff lasted from July to October 1859, but the joint military occupation of San Juan Island continued for 12 years, from 1859 until 1872. The dispute was finally resolved on October 21, 1872, when Kaiser Wilhelm I of Germany issued his arbitration ruling, awarding the San Juan Islands to the United States. The British peacefully withdrew their garrison shortly thereafter.
The Pig War took place on San Juan Island, one of the San Juan Islands in the Pacific Northwest, located between Vancouver Island (British Columbia) and the mainland of Washington State (then Washington Territory). Today, the site is preserved as the San Juan Island National Historical Park, which includes both the American Camp and the British Camp, where visitors can see original structures and learn about the conflict.
The Pig War is considered a 'history with a twist' because it is an absurdly trivial trigger—a pig eating potatoes—that nearly caused a full-scale war between two major world powers. The twist is that despite a massive military buildup (2,000 British troops vs. 66 Americans), no one died, and the conflict ended peacefully through arbitration. It subverts the typical narrative of war as inevitable, showing that diplomacy and humor can prevail even when cannons are aimed.