Paul Allen found the first carrier the US lost in WWII

While the converted collier, USS Langley, was America's first aircraft carrier, it wasn't America's first fleet carrier. That honor goes to the converted battlecruiser, USS Lexington.

Under the terms laid out in the 1923 Washington Naval Treaty, a naval arms control accord, the United States had the right to convert two of six planned battlecruisers into aircraft carriers. The Lexington and her sister ship, USS Saratoga, were selected and effectively saved from the scrapheap for this role. The Lexington was commissioned in 1927 and, over the next 14 years, she served in the peacetime Navy.

After the attack on Pearl Harbor, the Lexington took part in the abortive effort to relieve Wake Island. She then took part in various hit-and-run attacks on Japanese bases in the Marshalls until she went to the South Pacific to ward off a Japanese thrust towards Port Moresby. During the Battle of the Coral Sea, Lexington's planes helped to sink the Japanese carrier Shoho, but on May 8, she came under attack.

The Lexington was struck by two torpedoes at least one bomb. The ship's crew worked hard to keep the vessel afloat. The ship's Damage Control Officer, Commander Howard R. Healy, suggested to the captain that if he were to take additional torpedo hits, "it would be as well to take them on the starboard side." Healy would die in the process of controlling the extensive damage done.

A series of internal explosions would force the United States to scuttle the Lexington, making her the first fleet carrier America lost in WWII. She went down in the Coral Sea in 1942, but not before the Japanese were turned back, suffering a strategic defeat.

Earlier this week, Microsoft co-founder Paul Allen announced on Facebook that he found the Lexington. See this heroic vessel, whose sacrifice saved Port Moresby, in the video below.