
In the year 2281, the fifty-year-long conflict over territory between the United World Forces and the Raian Kingdom finally ended. But peace proved fleeting. A year after the truce was signed, Azrael, a former Raian military captain who had transformed himself into a cyborg in pursuit of becoming "the ultimate warrior," gathered thousands of other cyborgs and launched a war against the Raian Kingdom. Stealing mobile weapons from the military, this rogue force invaded the Raian capital, Merkid, and began capturing civilians. The United World Government, upon receiving a distress signal from the planet Raia, had no other option but to assemble and deploy an army centered around its elite unit, a group of warriors known as "Bloody Armor," to eliminate the enemy and save the hostages. Thus, in October 2282, the United World Forces commenced their assault on the planet Raia. The fiercest battle in human history is about to unfold.
In 2281, the United Earth Government and the Principalities of Raia agreed to a peace treaty, bringing to an end a fifty-year-long conflict. Exactly one year after the treaty was signed, the 18th reconnaissance unit of the United Earth Government reported that the Raian capital, Melkide, had fallen to an army of mysterious origin. In response, the United Earth Government ordered a military force to be sent to Raia to reclaim the city and save its inhabitants. However, the general public remained unaware that the real objective of the mission was to eradicate the unknown threat and establish Earth's dominance over Raia.