Okinawa is the most important island of the Ryukyu Group, the threshold of the four main islands of Japan.
Okinawa was, moreover, in the line of advance both to the China coast and to the Japanese home islands.
On Okinawa itself, the scheme of maneuver of the ground troops would be such as to gain early use of airfields that would enable landĀbased planes to maintain control of the air in the target area.