When does the Encircled Terrain take effect? Text: "Terrain Battle: Before this battle’s resolution, the Attacker and Defender, in the order of your choice, each choose one of his units at the current battlefield. Then, move all other units there home." The situation of relevance is when Impressive Resilience has been played. Text: "Battle: Target an opposed Personality. The target gains +2F and cannot bow or move during the current Combat Segment."
Encircled Terrain
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.
When does the Encircled Terrain take effect?
"Before this battle’s resolution" (card text).
http://rules.l5r.com/Battles#Resolution_Segment: "Effects 'before a battle resolves' happen after the Combat Segment ends and before the Resolution Segment begins."