Mortas' Army is an army formed and lead by Mortas, Leader of the South Desert. It is mainly made up of sand men and South Desert scorpions. The army usually resides in the South Desert, but has currently taken control of The Grand Cavern.
The army is also a part of The Death Army of The Wastes, having been recruited by Vlad Kronin during The War of The Wastes. The army has participated in both The War of The Wastes and The War of The Wastes II.
Mortas' Army was created by Mortas, Leader of the South Desert, after he made his home in the South Desert. Mortas used dark magic to create a race of machine and sand hybrids that he calls sand men. These sand men make up the majority of his army, and are powerful warriors. Mortas also recruited South Desert scorpions, large scorpions living in the desert, into his army.
During The War of The Wastes, Vlad Kronin sent Vex, Leader of the Ghouls, into the desert, to try and expand the reach of The Death Army of The Wastes. Mortas and the army attacked Vex, and the two forces battled. Mortas started winning, but Vex gained the upper hand as he called for more ghouls to aid him, and they soon defeated Mortas and the army. Mortas was spared by Vlad, and was made a general in his army, and Mortas' Army was integrated into Vlad's army.
Mortas and his army went on to aid Vlad during the Battle of the Planes, which went on for many days. The battle ended with The Great Elementian Army winning, and Vlad disappearing. Mortas managed to escape, and went into hiding. His army returned to the South Desert.
When Dracus Kronin started The War of The Wastes II, he called on Mortas and his army to aid him. The army attacked The Grand Cavern, and took control of it. It is believed Mortas also kidnapped King Rory and Lady Eliza.