Why did the united states get pulled into world war i?
a. germany owed the united states money for war supplies.
b. the united states was shown a letter from germany encouraging mexico to invade america.
c. mexico attacked the united states.

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.