USS Oklahoma was the second oldest USN BB deemed capable of facing IJN battleships and other forces in the Pacific (USS Nevada, her class leader, was the oldest). Nevada class BBs had 10 14"/45 main guns (succeeding 14" gunned USN BBs had 12 14"/45s or 14"/50s). USS Oklahoma was the last USN BB to have Vertical Triple Expansion (VTE) engines instead of steam turbine engines. VTE engines were slower, were not able to sustain full speed as long as turbine engines, and generally were less reliable.
While Oklahoma (and Nevada) had the least extensive torpedo defense system (TDS) (she was designed several years before WW1), she was hit by multiple torpedoes along one side, which would have overwhelmed just about any TDS in USN BBs, and water entered the ship too fast for effective counter-flooding. So Oklahoma quickly capsized, trapping many of her crew.
USS Arizona (of the Pennsylvania class, the class that was next after Nevada) was the only BB attacked in PH that was not raised. Her hull damage made her unsalvageable. Because of her extensive damage, her engines, and her lesser main battery, Oklahoma was deemed not worth rebuilding after she was raised. She sunk in a storm while being towed to the West Coast to be scrapped.
