If I am turn player and I Charm an enemy unit onto a battlefield I control, who is designated attacker and defender? If I Charm them and I lose, do they gain a point for conquering?

Ruling: The unit that contests the battlefield becomes the attacker, regardless of how they got there. If you lose the showdown and their unit remains, the opponent scores a point for conquering.

Nuances:

• Control of the battlefield determines who is defending, but attacker/defender status is determined by who contested the battlefield first, not who controls it
• If you reconquer that same battlefield later in the same turn, you will not score another point from it since you already scored from either holding or previously conquering it that turn
• It is possible for units to be defenders at battlefields they don't control, as long as they're present with another player's units that contested it first
• Control can be held or lost during a contest, but cannot be gained until the end of a showdown
• Attackers and defenders do not change within a showdown, only at cleanup