The MJOLNIR Powered Assault Armor is a highly advanced and technologically superior powered exoskeleton armor system designed to vastly improve many attributes such as strength, agility, speed, durability and reflexes of the United Nations Space Command's chemically, genetically and cybernetically augmented human personnel (known in laymen's terms as "SPARTANs"). It was widely considered the most successful - and expensive - powered armor series developed in human history, especially the late Mark V and Mark VI (by adding the feature of a fully functional rechargable energy shield).