The Shadow Army was the Shadow Lord's main force of attack, especially during his first invasion. The army was comprised of various creatures created in his Factory, led by human commanders. The army was initially defeated during the Battle for Deltora and after many centuries, revived with the creation of Grey Guards.
The army marched through Deltora through the Barrier Mountains destroying everything in their path. The army was determined to move south, however during winter they were forced to halt. Three commanders in the army drank the water from the Dreaming Spring and were transformed into trees.
Waiting on the Hira plains, the army charged towards the Plains troops. However, many were killed in the trap set by the Ralads. Although Sheela abandoned her post, the army continued to fight and after the aid of the Torans, were destroyed in their hundreds.