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Eight years ago, several large unidentified flying objects surrounded Earth and managed to render all large-scale offensive and defensive options within 8 hours. What followed then was the cumulative surrender of all the nations of the world. This event was named, "The Arrival."
What followed next was a systematic decimation of elected leaders. Individuals with fitting military and law enforcement backgrounds were invited to join the "proxy government" structure. The rest were hunted down and either terminated or, in rare circumstances, coerced.
The year is now 2017.