Control of the colonists and more compliance
Okinawa was actually the attack on Japan that happened in the closing days of the campaign
The Japanese built their ancient capitals, Heijokyo<span> (today's </span>Nara) and laterHeian-kyo<span> or </span>Kyoto, modelled after Chang'an in a more modest scale yet was never fortified.<span>The modern Kyoto still retains some characteristics of Sui-Tang Chang'an. Similarly, the Korean </span>Silla<span> dynasty modeled their capital of </span>Gyeongju<span> after the Chinese capital. </span>