The Mod developers aims are to rework the original game engine developed by Digital Illusions of Sweden (Dice) within legal and feasible constraints to create a more realistic combat environment for the gaming community. This includes adjusting various gameplay elements including physics, visual effects and overall game play formats. Along with changes to how the game handles, the PR team has introduced the British, Russian, Taliban and Insurgent factions, plus a number of community assisted factions are currently in the works to introduce Canadian, IDF forces and multiple others to the virtual battlefield.
These are already in the game, quick fix... add those to the "Included factions"