When you move an enemy unit into your occupied battlefield (e.g., with Charm), does that enemy become the attacker or defender?

Ruling: The enemy unit becomes the attacker. Even though your spell moved the unit, it is their unit that applies the contested status to the battlefield.

Sequence:

• You use a spell/ability to move an enemy unit into your occupied battlefield
• The enemy unit applies contested status to the battlefield
• The enemy unit is treated as the attacker