American involvement in Mexico was similar and different to other imperial efforts.

lincoln declared that slavery should not be allowed to spread into the new states, and of course this angered the south at the time.

religion played a major role in the american revolution by offering a moral sanction for opposition to the british--an assurance to the average american that revolution was justified in the sight of god. the revolution strengthened millennialist strains in american.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.

a) the colonists began to see themselves as different from people in britain.