How does Warwick's ability work with damage timing, and does damage persist between combats?

Ruling: Damage persists on units between combats and is only removed at end of combat and end of turn, not during cleanup. Warwick's ability triggers when he moves to a battlefield and kills all damaged units "here" (at that battlefield) when his ability resolves.

Sequence:

• Deal damage to enemy units (via spell or combat)
• Move Warwick to that battlefield
• Warwick's ability goes on the chain
• Players can respond with reactions (e.g., killing Warwick)
• When the ability resolves, all damaged units at that battlefield die (if Warwick is still there)

Nuances:

• Cleanup does not remove damage; it only checks state-based actions
• Warwick's ability uses "here" which means he must still be at the battlefield when his ability resolves for it to have effect
• If the ability said "at the battlefield" instead of "here", it would still work even if Warwick was removed
• Warwick does not kill undamaged units, even if they are stunned and don't fight back