Hello,
Reanimating warriors says "Interrupt: When this unit would be destroyed by taking damage, remove all damage from it and move this unit to an adjacent planet instead. (Limit once per phase.)"
I think that if there is no adjacent planet (because the unit is in HQ or because it is the 7th round of the game), you can still trigger the interrupt to replace the destruction and remove the damage that is already on the card. Is that correct?
Thanks!