The Mexican American War heightened tensions over slavery in that there were many disagreements over whether the new territories won from Mexico should be free or slave territories. The Wilmot Proviso, created to solve the problem, ended up slitting parties on regional areas.
Good luck :)
Washington's efforts failed because white settlers ignored the treaties and moved onto Native Americans' land.
The reasons for the alliances formed in the Texas legislature during that session were: first, there were two major factions in politics, Democrats and Republicans. During this session, there were three, the Democrats, the Republicans and the more conservative Republicans.
I believe it is that it led to the Japanese surrender on the battle ship of Indiana.
