I believe the date was April 1.
051005504
The U.S. captured it in the island hopping strategy to prepare to attack Japan's mainland.
Air distance from Omaha, Nebraska, United States of America to Naha, Okinawa total 7,016. That is 11,292 kilometers. That is 6,097 nautical miles.
After World War II, America occupied Japan for a time. Then we became Japan's protector because the treaty at the end of the war specified that Japan would not have a military. The US still has a base on Okinawa.
they fought in Iwo Jima, Okinawa and Midway Island
沖縄県 (okinawa-ken), which is "Okinawa Prefecture", omitting the last Kanji 県 (ken) makes it 沖縄 (okinawa).
Guadal Canal, Guam, Midway, The Mariannas Islands, The US Soloman Islands, Alaska, Iwo Jima, The Phillipines, Okinawa.
Okinawa is an island
Okinawa is a part of Japan so yes, Okinawa was in WWI.
Okinawa is in northern hemisphere.
Okinawa is in Japan not China.