The Halo TV series is changing the origin of Spartan shields and camouflage in a way that could have larger implications for the show's universe and its history. Halo episode 2 goes into further detail about the Spartan super-soldier program and the uglier side of the UNSC military, including drugged and mind-controlled soldiers. There is also competition between the different branches of the military, including a tense conversation between Miranda Keyes and a subordinate that helps give some insight into where the Spartans' shields and armor were created in the Halo series' timeline.
The energy weapons and shields in the Halo games are some of the series' most iconic items, helping to distinguish it from more traditional shooters. Energy shielding, distinguished by a lightning-like effect around a suit of Halo's Spartan armor or other surface, provides a layer of protection from both physical and energy weapons. The active camouflage system cloaks the user, mirroring the backdrop and making them near-invisible. Both abilities are used by the Covenant as well as UNSC, and make enemies more formidable in the Halo video games.
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The Halo TV show establishes that its energy shielding and active camouflage technology were pioneered by Miranda Keyes and have since become used throughout the whole military. In a conversation with Margaret Parangosky in Halo episode 2, Keyes comments that despite these innovations, her projects are marginalized in favor of those of Dr. Catherine Halsey, who is in charge of the Spartan super-soldier program. These technologies were reverse-engineered from captured Covenant gear and used to create the armor that Master Chief and other
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