"William Fritz demonstrates how a series of unrelated events converged to make the Lewis and Clark expedition - and America's dream of westward expansion - a reality. Maps guide the reader to the routes taken by Lewis and Clark, and a detailed timeline gives readers an easy-to-use resource for looking up important dates and events. Biographical sketches of major figures conclude the work. An extensive bibliography and index make this an ideal first stop for anybody interested in learning more about this remarkable expedition."--Jacket.