China's Rapid Buildup of Assault Ships and Aircraft Carriers, U.S. Begins 'War of Warship Repairs' in Korea, Japan As China and the U.S. are intensifying their naval arms race, China is rushing to rapidly build up its aircraft carriers and assault ships, while the U.S. is starting to operate Korean and Japanese shipyards for warship repairs starting next year. Reuters reported on the 8th that th..