The Treaty of Paris of 1783 that ended the American Revolution, brought the United States its long-desired liberty and independence from Great Britain. But with that separation came the loss of protection on the high seas for American merchant ships by the Royal Navy. And the removal of that security blanket had painful and expensive consequences for the young country which were first felt several thousand miles away, in the waters of the Mediterranean Sea.

Captains Meriwether Lewis and William Clark had guided the Corps of Discovery four thousand miles to the Pacific Ocean, and they planned to continue their explorations on the return leg of their journey. The plan was to temporarily split up the Corps with Clark taking one group to descend and explore the Yellowstone to its junction with the Missouri, Sergeant Ordway leading another party to the Falls of the Missouri and there make preparations to portage the Falls, while Lewis was to lead a third group up the Marias River and determine its northern most latitude to further establish the boundaries of the Louisiana Purchase.

The Lewis and Clark Expedition sighted the Pacific Ocean, or more specifically the Columbia River estuary, on November 7, 1805, and spent the next month exploring the area and searching for a suitable location to build a fort for the coming winter. It was a wretched month, one of the worst of the entire journey, as the constant rain soaked the men and their equipment. But despite the conditions, the men felt a growing sense of pride as they considered their incredible accomplishments since leaving St. Louis in May 1804.