Well it depends on what he summons, he's commanded a lot troops through out his life... So you know turn a corner bunch of minute men with muskets or if he wants to get really crazy he could summon a whole cohort of legionaries, but that would be pretty stressful on him. If you need me to I can make a list of any and all wars he was in so we have reference to go off of for the power, also generally it depends on the strength of the individual in life so a example. One Templar vampire hunter or 50 revolutionary's so it's balanced as we know the those muskets sucked and bullets not made of silver tend to suck against monsters, painful but not deadly the vampire hunter well he's equipped to fight vampires so he would be deadly but he's also one guy.