What level of losses?

[Weasel]

Well so far my French and Brits have stopped the Germans cold by being dug in and ignoring losses. Meanwhile my Germans have taken Dunkirk and surrounded and destroyed huge amounts of French troops.

So it appears that yes, the ignore will result in the defending unit being routed if attacked hard enough, but will also burn off the attackers turn. With reserve troops behind the lines it is a simple matter to move another force into the defending routed units hex and dig him in with ignore losses too.

Thanks for all the replies!!!!