2570 AD, the tide of the battle shifted again. After years of gathering strength and careful planning, the humans gained an advantage over the Zergs again.
However, that didn't last long either. Mid-year, Patroclus challenged Einherjar Li Zhedao and defeated the master of House Li with ease. The event was later called the "Great Fall." After the backbone of the human society was bested, the morale of the army took a toll. After a few defeats, the confederation lost its edge and was forced to the defensive side again.
After a few battles, humans learned that the percentage of hybrid Zergs in the Zerg population was very small. It could be further grouped into two categories. One type was like Patroclus, who had retained a lot of his host's features, and the other was a newer generation. The new generation not only had a lower rate of birth, but was also inferior in many aspects compared to the original hybrid Zergs.
