Describe the factors that led to the truman doctrine as well as how the doctrine affected the us foreign policy

In the "Truman Doctrine" President Harry S. Truman established that the U.S would provide the following for all democratic nations under threat from external or internal authoritarian forces.

The Truman Doctrine essentially implied U.S support for nations threatened by the Soviet Union. It became the foundation for the U.S Foreign Policy, and led to the formation of NATO.

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