"On April 7, 1805, the Corps of Discovery left Fort Mandan, where they had spent the previous winter, and headed west. On their maps, the land that lewis and clark was headed toward was indicated by a vast, blank space and the word, "Unknown."
From that point forward, every trail the Corps walked, every corner they rounded was new. No one had any idea of what was to come or what to expect.
This is where Into the Unknown begins ... "
Lewis & Clark, Into the Unknown.