about whabattalion in the mexicn war. >> the war is little known among americans, it is most important war fought between two neighbors in the western hemisphere, in 1845, texas is annexed by united states but the boundary claim is now an american problem. jamie: an opportunity for president james polk. a slave, holding tennessee dem grat who believeed that god ordained u.s. to expand across cony it confident. continent. they condemn this. a freshman congressman from illinois included. >> abraham lincoln is an opponent to the war, he gives a series of speeches. >> the war, first in history documented with photographs, breaks out in april 1846.