Can a player initiate multiple showdowns at the same battlefield in the same turn?

Ruling: Yes, there can be as many showdowns in a turn as a player can legally enact, limited primarily by movement resources and ready units. A player can return to the same battlefield multiple times in the same turn.

Nuances:

• It can be strategically beneficial to send attacking units one at a time to try to pick off a large battlefield and prevent being blown out by a removal or pump spell