User:XW3 AR3 L3GION/Fourth Sierra Regiment

"Advocatus Diaboli"

- Motto of the Fourth Regiment.

The Fourth Sierra Regiment is a special operatives regiment consisting entirely of SPARTAN-IV supersoldiers deployed before and during the Doisac War. The Regiment consisted of three thousand S-IV soldiers and was part of the Fourth Sierra Battalion along with its sister regiments: First Sierra Regiment, Second Sierra Regiment and the Third Sierra Regiment.