The Oregon Class Battleship was a rare joint-venture between KarmaTech and Rocketdyne during the Earth-Minbari War. Only the EAS Oregon saw action during the war, as the shipyard she was built at was ambushed by a Minbari raiding party. During the war, the EAS Oregon was crippled near Proxima. Her burnt out hull was recovered and rebuilt once the war was over. Five other Mk1 Oregon battleships have been built in the same way as the Oregon herself. While Mk2 Oregon Class Battleships feature a rotating midsection (same type that is incorporated into the Omega Class Destroyer) to simulate gravity.