It is where ignorant armies clash by night.
It is the refuse-plane of a million failed rebellions.
It is a plane of enforced order, where conformity is more important than good.
The hue and cry of battle is the first sound one hears when arriving on the Infernal Battlefield of Acheron and the last sound one hears when leaving. That’s all there is on Acheron: conflict, war, strife, and struggle. Many armies populate Acheron, but leaders are scarce. Truly, rebels without a cause are common on Acheron, whether they’re petitioners, mortals, fiends, or celestials.
Acheron has four layers, each made of island- or even continent-sized iron cubes floating in an airy void. Sometimes the cubes collide, and echoes of past collisions linger throughout the plane, mingling with the ring of sword on sword as armies clash across the faces of the cubes.
Acheron is the home of Gruumsh, the god of the orcs; Maglubiyet, the goblin deity and other yet unknown.