The first encounter with Euro-Americans for the Walla Wallas was the Lewis and Clark Expedition. The first meeting in 1805, the Americans promised to Walla Walla chief Yellepit they would visit with the people after seeing the Pacific Ocean. The party returned in April 1806 and stayed at Yellepit's village, located on the Columbia River near the mouth of the Walla Walla River. During a transaction Yellepit presented Clark with a white horse in return for a copper kettle. The Americans had none in supply, however, so Clark gave Yellepit his own sword, along with a quantity of gunpowder and musket balls. Lewis and Clark also gave Yellepit a peace medal engraved with a portrait of President Thomas Jefferson, to be worn around the neck, and a small United States flag. Yellepit, Washington was later named after him.