Why did the United States choose Okinawa as an invasion target in 1945?

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U.S. Marines on Okinawa — Battle of Okinawa U.S. Marines battling for control of a ridge near Naha, Okinawa, May 1945.

The United States targeted Okinawa in 1945 primarily because of its strategic location as a vital precursor to a full-scale ground invasion of the Japanese home islands. Situated just 350 miles (563 km) south of Kyushu, the island provided a necessary staging ground for the final phase of the Pacific War.1

American planners initiated "Operation Iceberg" with the goal of securing this proximity to Japan, hoping to overwhelm the Japanese garrison through a massive amphibious landing and preliminary bombardment. The capture of the island was intended to facilitate the broader Allied strategy of forcing Japan's surrender, as the Japanese military had refused to capitulate despite the ongoing naval blockade and strategic bombing campaigns.23