Hueco Mundo Conflict

The Hueco Mundo Conflict, other wise known as the Arrancar Civil War, is a major conflict between two Arrancar and Hollow armies led by then God-Queen Tier Harribel and the King of the Hollows, Apargon.

Prelude
Certain groups within Tier Harribel's Arrancar Army had been mysteriously wiped out during patrols and checks throughout the Hollow World, leaving at most one survivor to return and warn Harribel about mysterious assailant. After the attacks were becoming frequent, Harribel decided to send Gantenbainne Mosqueda and his force to investigate the incidents, knowing and hoping that their strength and size would be enough to hold off and uncover the identity of the attacker. However, this time, no-one had returned, finding that everyone in the force was killed by the time a recon squad was sent out to locate them. Finally disturbed with what had occurred and feeling a sense danger in the future for her army, Harribel expanded her control over Hueco Mundo in an attempt to gain as much territory and force more Arrancar and Hollows to join her ranks. As her power slowly grew, so did the frequency of the attacks, as well as the sudden aggression of Hollows that caused many to instantly attack Harribel's forces.