[u][b]Introduction[/b][/u] It is common knowledge that Thel 'Vadam, who we now know as the Arbiter played a bloody role in the Covenant War. Our only capability of quantifying the damage he wrought on humanity was with his only known battle being the attack on Reach. When The Master Chief Collection released back in 2014, though, the Terminals gave us new content to work with. While the narration provided by Agent Locke gives us some rough estimations of the damage Thel caused, I thought it would be insightful to look at the visuals and started adding the numbers up and playing around with the math. [u][b]Sources[/b][/u] CAA Factbook, Halo: Reach ONI File: Particular Justice, Terminal 3, Halo 2 Anniversary Palace Hotel, Halo: Evolutions Timeline, Xbox.com Dr. Halsey's Journal, Halo: Reach [u][b]Math & Explanation[/b][/u] For dramatic effect in Terminal 3, as the camera pans by, the death count of each colony continually rises. Each number given is the last reliable/knowable number of the given planet. Additionally, for Reach, because we know that people did actually escape the battle, I'm going to round its death count down to give leeway room for survivors. [u]Planets[/u] Estuary (89,320,839) Mesa (219,545,727) Greydowns (77,000,000) Kroedis II (15,350,400) Alluvion (336,575,292) Bounty (200,000,000) Reach (700,000,000) Unknown Planet Unknown Planet Unknown Planet Unknown Planet Unknown Planet [u]Math[/u] Estuary (89,320,839) Mesa (219,545,727) Greydowns (77,000,000) Kroedis II (15,350,400) Alluvion (336,575,292) Bounty (200,000,000) Reach (700,000,000) + Fleet Casualties (23,000) ------------------- 1,637,815,258 Obviously, because we don't have exact numbers, we can't say with certainty that the number given is perfectly accurate. So for the sake of significant figures, I'll round down to 1.6 billion deaths. Obviously that's a LOT of blood on a single person's hands and 1.6 billion is so large, it can be hard to fully grasp. If we apply the lens of the Covenant War as a total, we get some easier numbers. By October 2552, we know that 23 billion casualties had been sustained by the UEG and UNSC out of the 39 total billion humans. 1.6 billion/23 billion = 0.0695 1.6 billion/39 billion = 0.0410 This means that by October, Thel was responsible for roughly 7% of the total casualties inflicted by the Covenant, and responsible for killing roughly 4% of the human population. By the war's end though, humanity's most populous planet, Earth, had sustained massive casualties. Unfortunately, specifics on the total death count at Earth is largely unknown, estimated at being in the billions. If we look at things planet-wise we get: 11/800 = 0.0138 800 is too rough of a number though. That was humanity's colony count in 2900. By 2525, humanity could have added quite a few colonies to that number. We do know that some colonies did survive the Covenant War, so using just 800 may actually balance out in the end. Consequently, we know that Thel is responsible for destroying roughly 1.4% of humanity's colonies.