Well I dunno much about the Northwest Passage except what I found on Wikipedia meanwhile I was watching this show. And some from a book by Kenneth Roberts, titled Northwest Passage I read when I was a kid. This book ofc has nothing to do with the show it has entirely different topic. It is based on the life of Robert Rogers, an Irish officer of the Seven Years War who led his own ranger force - which based their strategy and tactics on the native Indian way of warfare - then was a governor of a backwater frontier settlement where he searched for the NW Passage.