preemptive

adj

1. Of or relating to preemption.
2. Made so as to deter an anticipated unpleasant situation.

   “a preemptive attack on the enemy”

   “The practice of self-censorship serves as a preemptive measure to avoid direct censorship or persecution when governments in autocratizing countries tighten their grip.”

3. Intended to interfere with an opponent's bidding.