Interstellar Marine Strike Force

For the men of the Interstellar Marine Strike Force stationed aboard the ECS Stryker have at last returned to Earth. Expecting a hero's welcome, they instead find the war against the Serkins has followed them home. The only option is to fight, but the question is, can this humiliating blow be turned into a victory? Will the victory hold any weight, and how far will someone go to make that so?