Which strategy of fighting the cold war was the most effective, why?

The six major strategies were:

Brinkmanship,

Espionage,

Foreign aid,

Alliances,

Propaganda,

Surrogate wars.

Explanation:

the completion of the erie canal spurred the first great westward movement of american settlers, gave access to the rich land and resources west of the appalachians and made new york the preeminent commercial city in the united states.