The Weaponmasters

It was 2033 when humanity made its greatest advancement in science, the discovery of the Akashic Records. It is the compilation of all worlds and civilizations in the True Universe. The discovery immediately led to Earth entering the Akashic Records. This ushered in a golden era that gave birth to Weaponmasters.
However, just as humanity was prospering, an unprecedented disaster happened. Other worlds and civilizations came and conquered Earth. A myriad of races took a piece of the blessed world. This caused humanity to be degraded into slaves for years.
At last, after 333 years, humanity broke free of the grasp of the conquerors. Now, it is 2533, and despite the rise of humans, they were still viewed as inferior species.
Could this generation of human Weaponmasters take back the world that was once theirs?