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.
In reference to this topic : viewtopic.php?f=59&t=64842&p=833424&hilit=countermove#p833424
Did u solved the problem ? We had a great fight and discussion about countermove and then I came here to find the ultimate truth. As I play Unicorn and my friend Lion, we had both situations !
Thanks you.
If a unit that was in an attacking army at any point during a battle’s resolution tries to move to any battlefield (even the same battlefield whose battle resolved) during the same Attack Phase, the unit does not move. This is not negation of the movement (see Do Not). Note that even if it is known beforehand that the movement will not occur due to this rule or any other effect, an action that moves a unit as one of its effects can still be taken, because of the Blind cards rule.
Thanks,