Castle Moat

Legend of the Five Rings card from The Truest Test

Card Type: Holding
Gold Cost: 2
Keywords: Singular, Castle
Card Text: w: Produce 2 Gold.
While you have exactly one Province, Personalities and Followers attacking you have -1F.
Legality: Age of Enlightenment (Lotus), Race for the Throne (Samurai)
Deck: Dynasty

Printings

Rarity: Uncommon
Flavor Text: "Domotai acts like a Lion, not a Crane," Shihei said. "We will do what is best for the clan, regardless of her foolishness."
Artist: Beth Trott
Card Number: 6
Publisher: Alderac Entertainment Group

Q: how long does the force reduction last from three stone river, does it last to end of turn or just until the end of the resolution of the battle
A: http://rules.l5r.com/Glossary_T#Terrain: "After battle resolution, discard any Terrains in play at the current battlefield. Discarding a Terrain in this way ends its ongoing effects, unless they are delayed to a point in time that has yet to occur, or their duration explicitly lasts beyond the battle resolution." Zen Faulkes, "Three-Stone River and Castle Moat", 10 Apr 2008
Q: Hey all, 1. Player B is attacking Player A's final province with any non-zero number of units 2. Player A has a Castle Moat in play. 3. Player A defends with any non-zero number of units 4. Player A takes the first action as the defender, and plays Three-Stone River. 5. Player B passes, followed by Player A
Would all units in Player B's army, assuming none had any followers with greater then 1F attached, be reduced to 0? If not, what would their force be?
Castle Moat: While you have exactly one province, Personalities and Followers attacking you have -1F
Three-Stone River: Text Terrain Battle: Before this battle’s resolution, reduce the Force of each Personality at this battlefield to the Force of his highest Force Follower, or to 1 if he has no Followers.
A: Continuous effects (e.g., Castle Moat) will apply before other effects (e.g., Three Stone River). Zen Faulkes, "Three-Stone River and Castle Moat", 10 Apr 2008