Maverick Wars

The Maverick Wars are a series of battles between the forces of Mavericks, led by Sigma, and the Maverick Hunters and their allies, led by X|X and Zero.

History
They began in the year 21XX, when Maverick Zero released the Maverick Virus into the Reploid population, causing some to go crazy and turn against everyone, including their human masters. Later, the Virus infected Sigma, current leader of the Hunters, where it, in the process of adapting to his advanced circuit designs, transformed into the Sigma Virus, which contained Sigma's own spirit and aims. Due to this, the Maverick Wars continued for a long time, as the Sigma Virus proved incredibly resilient to deletion and waged war as long as it existed. Eventually, it was destroyed with the Mother Elf, in the period between the Megaman X and Zero series'.

Effects
The Maverick Wars caused many of the main events shown in Megaman X through Megaman X8, as the objective of all 8 games was to defeat the Sigma and his Maverick forces. Particularily noteable was the crash of the Eurasia, which caused a near-apocalypse on Earth.