[MaxWilson]

Hold And Attack (None) simply means they have no preferred target. They pick a random unit out of all the enemy units and attack its squad, which often means they'll attack the biggest squad. If you want to hold for more than 2 turns you have to put them as Guard Commander on a commander who holds for several turns (up to 5). This can be useful if you want more turns to buff your troops, and is a pretty decent use for otherwise-useless indy commanders. (Don't be surprised if the commander dies. He doesn't matter.)

-Max