http://rules.l5r.com/CE_Battles
Flawless Assasin
Does the reaction trigger by end of battle resolution move if the unit is at home?
Flawless Assasin and Battle Resolution
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.
Does the reaction trigger by end of battle resolution move if the unit is at home?
No. http://rules.l5r.com/CE_Battles#D._Final_Steps: "Returning home in this manner is not movement."