Why did the U. S. support the creation of the North Atlantic Treaty Organization (NATO) in 1949?

The North Atlantic Treaty Organization or NATO was an organization created in 1949 to assist in providing protection against the Soviet Union. The organization was originally established by The United States, Canada, and some Western European countries but has expanded over the years.

But, that's all I know, sorry. :(

hold on ill go look

1.) irish.

2.) settlers could obtain cheap land nearby

3.) steam engine

explanation: