Spanish American war
1.Why does the US get involved in the problem in Cuba?

After the U.S. battleship Maine exploded and sank in Havana harbor under mysterious circumstances on February 15, 1898, U.S. military intervention in Cuba became likely. ... That same day, Spain declared war on the United States, and the U.S. Congress voted to go to war against Spain on April 25.

Explanation:

albany plan of union, 1754. the albany plan of union was a plan to place the british north american colonies under a more centralized government

north atlantic treaty organization.