So what exactly is the Summa Deep Space Incident?

I’ve looked on Halopedia and Fandom for any information about it, but they apparently don’t have anything on it. I was hoping someone could tell me what it is?

I guess I’ll never know…

This old BungieDotNet forum post seems to go into a bit of detail about it:
https://www.bungie.net/en-US/Forums/Post/1290428

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Thank you, I’ll take a look.