Question

Brinkmanship was a bold, aggressive idea because it required
the drastic decrease of defense spending.
enemies to engage in lengthy peace talks.
bluffing an attack so an enemy would back down
invading a country to force it to surrender.

Answer 1

"Bluffing an attack so an enemy would back down."

Brinkmanship is the Cold War strategy of pushing a dangerous situation to the verge of war — often by threatening massive retaliation — to compel an opponent to yield. It relies on threats and risk, not cutting defense spending, extended peace talks, or actual invasions.