S1, E3: Trailblazing pioneers set out to conquer the west, but find the land already claimed. Wagon trains meet hardship on the road to California's gold. The steamboat ushers in a new era of commerce, industry, and unprecedented wealth. In the south, cotton is king but slavery fuels a growing divide. Violence flares across the territories and the election of Lincoln is a harbinger of war. (2 hrs.)