During the tenure of <em>James Monroe,</em> the 5th us president, the country acquired Florida and Maine and warned Europe to forget about interfering in the Americas. President James Monroe said no European power should, in the future, try to establish a colony anywhere in the Americas, further noting that the political system of the European powers was somewhat different from that of the Americas.
Monroe declared any effort to extend this European system to any of the Americas would endanger the peace and safety of the United States.
The US Civil War was, as the terms states, a civil was in the United states which started at 1861 and ended at 1865. It started due to the differences between the slave and the free states in terms of power of the government to not allow having slaves in places which were not declared states yet.
Defensive trench warfare became <span>more common was the tactic chnge during the civil war. </span>
That would be Amendment 11. Lawsuits against the states passed in 1795.
Uhhh need more info for an answer