Only the preservation of the Union prevented the reassertion of European powers into the Western Hemisphere. The Germans, shut out of Africa and Asia by the British and French, would have found South America very tempting. Don't forget that hundreds of thousands of Germans emigrated to Argentina, Brazil, and Chile. The existence of two, and probably more, independent and rival nations on the current U.S. territory would have made the Americas a playground for the European powers. Perhaps they would not have re-colonized the former U.S., but they would have had wide latitude in Latin America.
Gen Lee and the ANV would have made mince meat out of Napoleons Army. (Even if you upgrade the Frenchy's rifled muskets to Springfields )
“As Texas evolved from a cotton producing state to a cattle producing one, its interests would have diverged from the rest of the South. “
Texas leads the Nation in cotton production and only produces 30% of the nation’s cattle.
http://cotton.tamu.edu/cottoncountry.htm