Ep. 3: Harassment

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After successfully destroying the spider tank, the K321 are assigned to attack and destroy an enemy artillery base. In a flashback to their training period on Mars, it is shown that they were being trained differently from other recruits to fight as a team under the authoritarian John Doe. However, they performed badly because they acted as individuals they lacked effectiveness. Meanwhile, they manage to reach their target, a heavily fortified artillery base. (Source: Wikipedia)