These knights can only be recruited by Lords of a faction, and are the cream of the crop. To balance the overpowerful mounted troops that the vanilla game had, the developer has made the Elite troops: Knights.
Nor are the Empire as useless in combat like their Rhodok-equivalent. The factions has been heavily balanced, there are no more easy-access to mounted troops from the D'shar like Khergits had. There is a sixth faction Pendor, but I'll let you figure that one for yourself. The factions consists of: Sarleon (Swadian-type), Ravenstern (Vaegir), Empire (Rhodoks), D'shar Principalities (Khergit Khanate) and Fierdsvain (Nords). The PoP gives you a very solid and fleshed out history, of which more can be read here.
The mod is a single-player overhaul, meaning it changes everything: the troops, factions, background history, a background theme music, added building options, new unique Heroes, new troop trees and items and also changes the entire continent. I'm not gonna waste words explaining what the game is, instead, what this mod adds. Many of you know of Mount & Blade: Warband, the thrilling medieval, tactical, hack 'n' slash game that gave us hundreds of hours of gameplay blood frenzy.
