322.5. Assign or Remove the Attacker or Defender designation from Units as needed if there is a Combat in progress
322.5.a. If there are Units present at the Battlefield the Combat is taking place at, but do not have a designation, they gain the same designation as their Controller now
322.5.b. If there are Units present at the Battlefield the Combat is taking place at, but have the opposite designation of their controller, they lose that designation, and gain the same designation as their controller now
322.5.c. If there are Units at locations other than the Battlefield that the Combat is taking place at, but have either Attacker or Defender designations, they lose those designations now