The Battle of the Sol System or The Fall of Earth was the largest defeat of the Galactic Alliance of Free Species to the hand of the Cabal. Their objective was to take control of the Portal to join the Ark and secure the installation to create new Halo rings. The Galactic Alliance of Free Species was totally caught by surprise bu the Cabal force and while it was heavily outgunned by the enemy managed to hold it ground util the general fallback order was given. At that time a military scenario was already planned by the Alliance in case of a Key System like Earth would fall and the preliminary procedure leading to OPERATION: Take Earth Back. However it would take 13 months to launch a counter attack. Following the successful attack by the Cabal, Earth was locked down by a shield generator c