Question

which of these was a feature of the relationship between the soviet union and the united states in the era leading up to détente?
nuclear war
direct conflict
arms race
cooperation

Explanation:

Before détente, the U.S. and Soviet Union engaged in a buildup of nuclear and conventional weapons as a core part of their Cold War rivalry. Nuclear war never occurred, direct large-scale conflict was avoided, and cooperation was minimal compared to the arms race.

Answer:

arms race