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Josh is correct.The only abilities that count as withdraw area). cards that say "withdraw" or "retreat", which return a card to territoryb). cards that return a character from battle to territoryc). cards that return a character from battle to hand, I believe also countsAnd all of these apply whether I do it to my own character or you play a card that forces my character to return.
I'm still unsure of whether ignoring would do the trick; does ignoring a hero technically cause the hero to return to territory? I'm thinking the answer is no, but I can see it going either way.