The Alliance's first line of defense is the Odessen planetary shield. This defense grid protects the Alliance base and the surrounding area from turbolaser bombardments and other aerial attacks. Although walkers and ground troops can slip through the shield, the defense grid ensures the Eternal Fleet cannot wipe out the Alliance with a single devastating bombardment.
The shield's construction was spearheaded by Doctor Oggurobb, the Alliance's sharpest scientific mind. When Oggurobb conducted early stress tests on the shield, Fleet Admiral Bey'wan Aygo bet that his strongest battleship could break through the fledgling defense grid. Fortunately for Oggurobb, the shield held strong--and Bey'wan is still paying off his debt.