500,000,000 BCE
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The year 500,000,000 BCE was a year in the distant past.
Events[edit]
Unknown[edit]
Circa 500,000,000 BCE[edit]
These are events that are based around this year, and may not fall on this year specifically.
Over half a billion years ago
- During a debate with Mendicant Bias, the Precursors were hinted by the Gravemind to have created the Mantle by accumulating a vast reserve of rules based on experiences and disputes.[1]
Sources[edit]
- ^ Halo: Silentium, String 24
