USS Kentucky (BB-66) was an uncompleted battleship intended to be the last ship of the . Hull BB-66 was originally to be the second ship of the s. However, the urgent need for more warships at the outbreak of World War II and the U.S. Navy's experiences in the Pacific theater led it to conclude that rather than battleships larger and more heavily armed than the , it quickly needed more fast battleships of that class to escort the new s being built. As a result, hulls BB-65 and BB-66 were reordered and laid down as Iowa-class battleships in 1942. As such, she was intended to be the sixth and final member of the Iowa-class constructed. At the time of her construction she was the second ship of the United States Navy to be named in honor of the U.S. state of Kentucky. Like her sister ship , laid down as one of the last pair of Iowa-class ahead of her, Kentucky was still under construction at the end of hostilities and became caught up in the post-war draw-down of the armed services. Her construction was suspended twice, during which times she served as a parts hulk. In the 1950s, several proposals were made to complete the ship as a guided missile battleship, abandoned primarily due to cost concerns and the rampant pace of evolving missile technology. Kentucky ultimately was sold for scrap in 1958. Iowa-class battleship Kentucky was conceived in 1935, when the United States Navy initiated design studies for the creation of an extended that was not restricted by the Second London Naval Treaty. This resulted in one of the "fast battleship" designs planned in 1938 by the Preliminary Design Branch at the Bureau of Construction and Repair. The passage of the Second Vinson Act in 1938 had cleared the way for construction of the four South Dakota-class battleships and the first two Iowa-class fast battleships (those with the hull numbers BB-61 and BB-62). The latter four battleships of the class, those designated with the hull numbers BB-63, BB-64, BB-65, and BB-66 (Missouri, Wisconsin, Illinois, and Kentucky, respectively) were not cleared for construction until 12 July 1940.