The Fall Of Metru Nui

The Fall Of Metru Nui was the last battle of the Toa-Dark Hunter war, and the prelude to the Destiny War.

Prelude
For several months the island of Metru Nui had been besieged by the Dark Hunters, whose efforts to conquer the island had been largely unsuccessful due to the efforts of a combined defense force made up of Toa and Matoran. On the eve of defeat, the Shadowed One, leader of the Dark Hunters, was approached by an emissary of the Brotherhood Of Makuta, who came with a message: the Brotherhood was willing to assist the Dark Hunters in their conquest of Metru Nui in exchange for parts of the city to use as a staging ground for their forces. The Shadowed One agreed to these terms, and the Brotherhood dispatched a fleet of War Blimps to bomb the island.

The Battle
Early in the morning, the fleet of Blimps arrived, filling the sky over head. By the time the Blimps had been spotted, the bombing had already begun. The Blimps began dropping shadow leech bombs on major population centers, aiming to convert as many of the populace as possible to their cause. The infection quickly spread, and before long the infected Toa and Matoran had nearly overrun the city, leaving destruction in their wake. The remaining defenders had been pushed to the city limits as the blimps bombed the Coliseum. The defacto leader of the Toa army, Lhikan, reluctantly decided to evacuate the civilian population from the island. In order to protect the Matoran as they boarded the longboats, Lhikan ordered her troops to construct fortifications around the port in a grid formation, and to hold off the enemy for as long as possible before falling back. It wasn't long until the enemy forces reached the port and launched their attack. Lhikan's forces fought valiantly, but were massively outnumbered by the combined forces of Brotherhood and Dark Hunters. The hastily constructed fortifications were quickly overrun and the enemy began slaughtering the defenders. In a final act of desperation, Lhikan unleashed a fire nova blast to buy time for the survivors to escape. By the time the last boat out had left the port, Lhikan and hundreds of other Toa had been massacred. The island belonged to the Brotherhood and their allies.

Aftermath
Thousands of refugees from Metru Nui flocked to major landmasses in search of a new home. Many of the Toa that survived the battle, including Naho, joined up with the Order Of Mata Nui to avenge their fallen comrades and insure that Metru Nui would be the last and only conquest of the Makuta. The city itself was decimated during the battle, with many of it's most famous landmarks completely destroyed. Those few survivors left on the island formed small resistance cells in hopes of eventually retaking the island.