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Transformers - timeline
Cube arrives on Earth.
7th September: Captain Witwicky finds something mysterious underneath a lot of ice. Designated 'Project Iceman', the artifact is the Allspark.
Captain Witwicky and his crew reach the Arctic Shelf discovering the Allspark (Arctic Shelf)
The All Spark is located by Sector 7.
Megatron transported to the US from the North Pole. (USA)
Megatron is frozen by Sector 7. (Hoover Dam)
The Beagle 2 Mars rover lands on Mars and is destroyed by a massive humanoid robot; the video transmission is classified "Top Secret" and a cover story about the lander crashing is concocted. (Mars)