 Today we're on to Army Explorers in the sort of interior west. So as I told you all last time, we've been proceeding pretty chronologically up to this point. This lecture is going to kind of spin us out onto a thematic topic. So we're going to start right around Thomas Jefferson, who we left off talking about on Monday. But we're going to jump all the way through forward to the U.S.-Mexico War and the Civil War.