When a player uses Charm to force an opponent's unit to move to a battlefield they control, who becomes the Attacker in the resulting Combat?

Ruling: The Attacker is the player whose unit(s) applied the Contested status to the Battlefield, regardless of who controlled the effect that caused the move.

Nuances:

• Even if you use Charm to force your opponent's unit to move to your battlefield, your opponent becomes the Attacker because their unit applied Contested
• This affects how abilities like Assault and Shield function in the Combat