List all of the countries and the year in which the United States acquired these territories while President McKinley was in office.

The Republic of Hawaii, Philippines, Puerto Rico and Guam in 1898

Explanation:

President McKinley's administration and foreign policies led to the United States becoming a major power in the world, and established an American Empire. During 1897-1898, there was a rebellion in Cuba to get freedom from Spanish rule. America tried to support the rebels and went forward with negotiations with the Spanish. It resulted in a war, the Spanish American War. After the 1898 Spanish American War, US acquired the following places:

The Republic of Hawaii, Philippines, Puerto Rico and Guam

During the war, the US had temporary possession of Cuba.

African americans at the time just came out of slavery and needed money to provide for there families. so they joined for the money mainly.