1. What is the name for a person in the mid-1800s who opposed slavery?

An abolitionist, as the name implies, is a person who sought to abolish slavery during the 19th century.

Explanation:

An abolitionist, as the name implies, is a person who sought to abolish slavery during the 19th century.

North Atlantic Treaty Organization (NATO), 1949. The North Atlantic Treaty Organization was created in 1949 by the United States, Canada, and several Western European nations to provide collective security against the Soviet Union.