Doisac campaign

The Doisac Campaign was the largest and final engagement of the, which pitted the and  against one another on the Jiralhanae homeworld of.

Though both sides sustained heavy casualties, the Loyalists were ultimately defeated -- losing not only the battle, but the war as well.

Background
When the made their retreat into hiding, the Jiralhanae  leadership had inherited control of the Covenant. The faithful Alpha Chieftains, once scattered acrossed Covenant-space, regrouped on Doisac -- bringing much of their military might with them -- and turned their homeworld into the capital of the Covenant.

As the war continued, and the Loyalists suffered increasingly costly losses to the Sangheili, the Alpha Chieftains began recalling large numbers of their forces closer and closer to their capital. After it became known that the entirety of the Loyalist leadership was hold up in the system, the Sangheili-led Separatists prepared to launch a devastating assault.

A massive armada consisting of numerous fleets was assembled and commanded by none other than the kaidon, whom wished to silence the Covenant once and for all.

Separatist Arrival
The first wave of Separatist warships arrived in the form of a task force led by Tora 'Kivam. Jumping into the Oth Sonin system over the gas giant Jondum, they managed to avoid detection from the Loyalist's sensory array and begin softening the defenses for Thel Vadam's incoming armada.

The operation began with the task force launching a covert strike on Solrapt -- the center of communications for the Oth Sonin system.