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Force-Multiplying Circuits are components of the MJOLNIR Armor system developed by the UNSC for use by the Spartans. These circuits are located throughout the armor, boosting the force applied by the user. They make hand-to-hand combat easier, especially against stronger Covenant forces, but also make the armor difficult to adjust to; a slight motion can be translated into a potentially harmful one if not conducted correctly. For this reason it is only possible for Spartans to use this armor, as their strengthened bodies are able to withstand the increased power and speed of movement which, in un-augmented human bodies, results in broken bones or death, due to spasms caused by the pain of broken bones. Given the large energy consumption of the force-multiplying circuits, the reality of creating such technology is highly improbable by modern standards.