A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
Doomed Intentions
Battle: If there are enemy units at the current battlefield: Move one of your target units there. If it moved, straighten it. If you are the Defender, take an additional Battle action printed on a card in the unit.
Noting how the card does not say "...any enemy units..." but just "...enemy units..." (plural), can I play the battle action if the opposing player has only ONE unit in the current battlefield?
Doomed Intentions
Battle: If there are enemy units at the current battlefield: Move one of your target units there. If it moved, straighten it. If you are the Defender, take an additional Battle action printed on a card in the unit.
Noting how the card does not say "...any enemy units..." but just "...enemy units..." (plural), can I play the battle action if the opposing player has only ONE unit in the current battlefield?
You can play it even if there's only 1 unit.
Any number > 0 is considered to test true for "are there enemy units?"