"Newcomer-2012. Summer"

Well, that makes sense. The person is talking about splitting up units in a non-upgraded Guardian Order (GO).

Yes, you're attacking a non-upgraded GO. And if there are, say, 49 giants there, and you attack with a Shoah, then in 20% of cases, a stack of 7 Titans will appear. The Shoah will be killed, but 42 units will remain in the GO. You can only do this trick with a non-upgraded Guardian Order.