“If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle.”
― Sun Tzu, The Art of War
What is the adversaries primary tools? Lies and deceit along with some murder when the previous two don't work.
How do you combat lies and deceit? With truth.