Two days.... Two bloody days since the Covenant had found Earth. Two days and over half of the planet's population, gone..... The UNSC Marines had given it their all, but they knew there was little chance for victory. The Covenant came with such force, such speed, that 60% of the Earth's human defenses were wiped out in a single day. Whole nations overtaken, then destroyed minutes later. The only fighters left included the severely thinned marines, most cut from supply chains with droves of wounded men, and civilians who had taken up the cause. However, there was one last effort already put into motion by the UNSC, one they hoped would turn the tide of the war. They had seen this coming, and the Spartan program had been reactivated. It was time for a new force to take up the cause.......