During the 1950s, Secretary of State John Foster Dulles argued that the United States should be prepared to go to war in order to contain communism. What was this policy called?

The correct answer to the following question will be "Brinkmanship".

Explanation:

So, it's the right answer.

Brinkmanship

Explanation:

The practise of trying to achieve a superior  position by pushing events to the state of active conflict. It is used in foreign policy, politics, labour relations and international politics.  The  country engaged in brinkmanship tries to create such an impression that it can use extreme methods also.

The term is mostly associated with  John Dulles, he was Secretory of State during president Eisenhower's administration. He tried to tackle Soviet aggression by warning that Us would retaliate by attacking the Soviet targets.

the roman army grew in size and became dominant in the mediterranean region.