Yep, they had 3 units going in, each with a commander or general, so 5 or 6 attacks per unit, striking first because of their Kontos and hitting on 3's against the retainers as Superior fighters. Their good defence meant they we hardly taking any casualties in return.
The Bushi held up ok but the retainers got mashed.
On reflection I should have pushed the Bushi forward to take the charge and not commit the retainers. I could have still kept the retainers in the battle line to support the Bushi.