Pig war occurred when Oregon treaty was signed between US and Britain.
Step-by-step explanation:
An American farmer shot a pig which ate his potatoes this ridiculously led to the conflicts that occurred eventually between Great Britain and US. Oregon treaty was signed which defined the borders between America and Great Britain. In 1859, it was judged that a pig which belonged to the British entered the land of Lyman Cutler who is an American Farmer.
In an instant rage, the farmer shot the pig and killed it. The pig was owned by the British employee in Hudson Bay. A dispute over a pig resulted in involving three warships, 84 guns and two thousand army men who marched against Britain and that led to the war.