Welcome to TheSwanMod for RTW1, that taking the Vanilla gameplay and extend it by combining 3 main aspects: 1)Europa 270 map by Webbird, 2)RTW Units Addon Mod by Yiu_DJC, 3)My own tweaking and adding all-around.
Those are 2 extra units to the Numidians, i used the "merc arab cavalry" that already was in the game for those, we got the foot soldiers called "Desert Warriors" much like the "Desert Infantry" but instead of spear this unit have a sword, and the mounted one you can see in the image its just like the merc arab cavalry itself only got the Numidian color, called "Numidian Desert Riders", they both will act as Numidian and Mercenary(as you also can see in the image)*fixed the way they sit on the horse dont worry