cRPG is a modification for Mount & Blade II: Bannerlord. It adds persistent multiplayer character stats, hundreds of unique items, an online campaign, clans, duel ladder, a co-op game mode and a few more things.
Taken during a Strategus field battle this screenshot shows a team employing the use of a shield wall. Shield walls are often used to defend infantry/siege equipment from enemy ranged before fighting starts and during organized pushes.