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Still dealing with his personal loss and a severe injury suffered in the rescue of Igor and the captured girls, John is determined to reach Australia to punish the Russian president. But the militia that had taken the girls is now surrounding the facility at Area 51 and is intent on exacting vengeance. John must battle his way free and find a way to make the journey to Sydney as Admiral Packard begins a mass evacuation of Hawaii.

With a Russian invasion force threatening, and a downed American pilot in the Sea of Cortez, John must set aside the most personal loss of his life and continue the battle to save what remains of America. Leading a lightning mission into Mexico, he encounters survivors who have formed militias and pose a threat to anyone who is not part of their group. Meanwhile, Admiral Packard prepares for the final defense of Hawaii.