Nexus Ops
Must a Critical Objective battle repeat the same attacker and defender, and can it chain into a third battle?
It repeats the same attacker against the same defender, and it cannot switch defenders. It can chain: a Critical Objective can start a further battle in the same hex. The same-defender rule rests on a 2007 customer-service reply and a later ruling that posters dispute, so treat it as the community's best reading.