Sand Men are machine and sand hybrids that were created by Mortas, Leader of the South Desert. The sand men make up the majority of Mortas' Army, and work alongside South Desert scorpions. The sand men are often seen riding the scorpions, as it allows them to travel faster. They are powerful warriors, that are fully loyal to Mortas.
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.