In 1859, a surprising event almost led to war between the United States and Great Britain. You might wonder how a single pig could have such an impact on international relations. The Pig War wasn’t about fighting, but rather a dispute over a pig that wandered into a farmer’s potato patch on San Juan Island.
Lyman Cutlar, an American settler, shot the pig owned by British farmer Charles Griffin, igniting tensions between the two nations. With troops mobilizing and threats of conflict looming, this strange incident highlighted how small events can escalate into larger disputes.
As you read on, you’ll discover how this almost-war was resolved without significant bloodshed and what it reveals about diplomacy and human nature.
Historical Context and the Oregon Treaty
The events leading up to the Pig War are rooted in historical agreements and land disputes between the USA and Great Britain. These agreements set the stage for conflicts over territory, especially concerning the San Juan Islands.
Treaty of Washington and Boundary Disputes
In 1846, the Oregon Treaty was signed to define the boundary between the USA and British territories along the 49th Parallel. This agreement was significant, as it aimed to settle ongoing disputes over land ownership. However, the treaty did not clearly state what would happen to the San Juan Islands, which led to confusion among settlers.
The Hudson’s Bay Company played a key role during this time, managing British interests in the region. You might be surprised to learn that tensions rose again in 1859 when the Boundary Commission was established to resolve these issues. They faced resistance from both Americans and British settlers, as many had their own claims and interests in the territory.
The Donation Land Claim Act
The Donation Land Claim Act, passed in 1850, was another important piece of legislation that affected land ownership in Oregon. This act offered land to settlers willing to move to Oregon and cultivate it. You may find it interesting that this encouraged more settlers to come, leading to increased competition for land.
George Bancroft, a notable historian, supported this act as a way to promote American expansion. The influx of settlers created more disputes over land, drawing attention to unresolved issues from the Oregon Treaty. This environment set the stage for the Pig War, as conflicting claims brought tensions to a head.
The Pig War Escalation

Tensions on the San Juan Islands rose sharply due to a series of confrontations. The clash between an American farmer and a British employee set the stage, leading to a rapid military buildup by both the American and British forces. International discussions, particularly involving German Emperor Wilhelm I, aimed to resolve the conflict before it turned into war.
An American Farmer and a British Employee Clash
The incident began in June 1859 when Lyman Cutlar, an American farmer, found a British-owned pig rooting through his potato patch. Tensions flared as Cutlar confronted the British employee, James Douglas, who represented the Hudson’s Bay Company. This seemingly trivial problem turned serious when Cutlar shot the pig after repeated requests to remove it were ignored. The British reacted strongly, leading to a standoff between Cutlar and Douglas that fueled national pride and tensions.
Military Buildup on San Juan Island
Following the pig incident, both the United States and the British Empire took swift action. American soldiers, led by George Pickett, were sent to San Juan Island to assert U.S. claims. In response, the British Navy increased its presence in the region, with warships positioned near the Haro and Rosario Straits. The area became tense, with both sides prepared for a confrontation. This military buildup was alarming, as both nations were aware that a small conflict could quickly escalate.
International Arbitration and Wilhelm I
As the situation on San Juan Island grew critical, leaders on both sides sought a peaceful resolution. International arbitration was proposed, with German Emperor Wilhelm I agreeing to mediate. This was an important step, given that diplomatic solutions were preferred to bloodshed. Wilhelm I’s involvement helped both the U.S. and the UK to take a step back from the brink of war. His role was essential in cooling tensions, leading to a treaty that avoided a major conflict.
Aftermath and Legacy
The events following the Pig War shaped future relations between the United States and Great Britain. They led to diplomatic discussions that resolved the border dispute peacefully and established a historical site for future generations to appreciate.
Diplomatic Resolution and the Treaty of Oregon
After the Pig War scare, both the U.S. and Britain realized a military conflict over San Juan Island was not desirable. President James Buchanan sent General Winfield Scott to negotiate. This effort highlighted their desire for a peaceful resolution.
The Treaty of Oregon, signed in 1846, eventually settled the border along the 49th parallel, granting the U.S. control over the San Juan Islands. This treaty was crucial in eliminating tensions between American settlers and the British Empire in the Pacific Northwest.
San Juan Island National Historical Park
Today, the San Juan Island National Historical Park commemorates the unique history of the Pig War. This park also commemorates the peaceful resolution of the border dispute.
You can explore military installations that once housed American and British forces. The area also includes stunning views of the Strait of Juan de Fuca and the Gulf of Georgia. Visitors can learn about the Hudson’s Bay Company’s role and the history of the British North America influence.
The park plays an essential role in preserving American history. It reminds people of the importance of diplomatic solutions over military action.