Okinawa ground order of battle
This is the order of battle for the US invasion of the island of Okinawa, the largest island of the Ryukyu chain. This offensive, called Operation Iceberg by its planners, was the final Allied offensive in the Pacific Theater of Operations in World War II. The defending Japanese military was determined to inflict a casualty rate so high that the U.S. government would choose not to invade the Japanese home islands.
Source: Wikipedia — Okinawa ground order of battle (CC BY-SA 4.0)