Spartan Warriors is a mod where the fighter champion troop tree gets an improved troop, the Imperial Scale Armor is changed to an Imperial undergarment with the same armor values, and the Infantry's highest level skill template is altered.

In this mod, Spartan Elite Equipment and Spartan Elite Skills have been added.

Copy the SpartanWarrior folder into SteamsteamappscommonMount & Blade II BannerlordModules to install the mod.

Ensure that all of the original modules are underneath the Spartan mod.
the menu of the launcher.

The Spartan Elite is far too powerful to be recruitable in the main campaign.
Therefore, you must install the DeveloperConsole mod in order to obtain the Spartan Elite.