This datapack packaged as a mod overwrites the armors, weapons, food that the Guard Villagers spawn with.
Currently, 5 sets of armors (from bad to good) and all iron weapons + heavy crossbow are used from the Epic Knights mod, Guard Villagers will now also spawn with other food items as well instead of just only bread.
For balancing purposes, I recommend having Guard Villagers Item drop chance at 0.
