Final answer:
The USSR China Treaty of Friendship, Alliance, and Mutual Assistance was signed in 1950 between the Soviet Union and China. The U.S responded with concern and implemented a containment policy to prevent the spread of communism.
Step-by-step explanation:
The USSR China Treaty of Friendship, Alliance, and Mutual Assistance was signed in 1950 between the Soviet Union and China. This treaty aimed to strengthen the relationship between the two countries and commit them to assist each other in the event of an attack by an external party. Under the treaty, they pledged to combat any renewed Japanese aggression, work towards advancing their mutual interests, and refrain from forming alliances hostile to one another.
The United States responded to the treaty with concern. The U.S saw it as a threat to its interests in the region and feared the spread of communism. In response, the U.S implemented a containment policy to try to prevent the spread of communism in Asia. This included providing military and economic aid to countries such as South Korea and Vietnam to counter the influence of China and the Soviet Union.