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Welcome to Halopedia, the Halo wiki and definitive source for Halo information that anyone can edit. This encyclopedia is edited and maintained by a dedicated group of Halo fans! We are currently working on 15,266 articles created since November 4, 2004, and you can help us! Sign up or login to receive exclusive features and customization. Check out the new pages, recent changes, and statistics. Don't know what Halo is? Then read our summary here! If you've never been here before, you can find out more by checking out the about page. You can also find us on Twitter, Facebook, or our Discord server.
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Article Improvement Drive is a community project to improve the wiki's content through bringing articles in dire need of improvement—from cleanup to content expansion and updates—to everyone's attention. Anyone is welcome to participate in the project!

A small sampling of articles in need of new content:

The following articles for Halo media could use the addition (or completion) of a plot synopsis:


See the AID project page for more information!
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Aggressor Sentinels are Forerunner drones designed to operate in both security and maintenance roles. Each installation has its own unique variation of Aggressor Sentinel, though they all share the same methods of operation and structural design. All known variants of Aggressor Sentinel are equipped with a powerful sterilization beam weapon and energy shields for protection. While Aggressor Sentinels are most well-known for their task of containing and neutralizing Flood outbreaks, they will respond violently to any sufficiently hostile presence, as well as assist Constructor Sentinels in repair operations.


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I can give you over forty thousand reasons why that sun isn't real. I know it because the emitter's Rayleigh effect is disproportionate to its suggested size. I know it because its stellar cycle is more symmetrical than that of an actual star. But for all that, I'll never actually know if it looks real...if it feels real. Before this is all over, promise me you'll figure out which one of us is the machine.
Cortana to John-117, Shutdown, Halo 4


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