Help! T^T How did the United States try to fight against communism (without actually going to war)?

Describe
two ways.

Describe the technology advancements that lead to explorers being able to sail great distances. [[ps: doesn't explain where. i am only speculating it's in europe.

Which event is considered to be start of the "hellenistic era"? a) the founding of the roman empire b) the death of alexander the great c) the end of the peloponnesian wars d) the founding of the roman republic

What was the main reason british sued for peace in 1783