Yorktown class aircraft carrier
The Yorktown class were designed from the Lexington class aircraft carriers, which were built before the Yorktown class. Under the Washington Naval Treaty, naval size was greatly limited. This led to the scrapping of many ships. Some ships that were not completed yet were changed into aircraft carriers, and these included the Lexington class. The Yorktown class was built from the start as a carrier, which had some good sides. Early designs called for no island. However, the drawbacks from having no island were known, and the designs were switched.