Greetings, Teresa !
This engagement covered the period 1 April 44 / 31 July 44.
The invasion started with a massive bombardment from naval
ships, and involved 44,825 rounds of heavy caliber shells,
32,000 rockets and 22,500 mortor shells.
Personnel-wise, the island was manned by approximately 100,000 Japanese, against which we launched 187,000 troops, including elements of the 77th Infantry Division , and the 6th Marine Division, which moved north of their landng site,
meeting heavy resistance in the Motubu Penisula.
In the course of this engagement, they killed 2,500 Japanese, and in turn we lost 218 Americans killed and
A major offensive tactic used by the enemy were the kamikaze raids by aircraft. One such raid on 6 April 44, involved 700 aircraft against our naval vessals, which resulted in the loss or damage to 13 U.S. destroyers.
Okinawa was considered to be the costliest operation in the Central Pacific. By the end of this campaign, right at 1,000,000 troops were involved, with Japan losing more than 100,000 men killed, and the Americans experiencing 49,000 casualties, of whom 12,500 were killed in action.
WORLD WAR II,
A Visual Encyclopedia,
Chris Ellis, editor,
PRC Publishing, Ltd. (1999).
I have two other excellent references:
WORLD WAR II ORDER of BATTLE
Shelby L. Stanton, author,
Galahad Books, NYNY, publisher (1991)
(NOTE: The Stanton reference covers U.S.Army Divisions.)
2194 DAYS OF WAR
An Illustrated Chronology of the Second World War,
Compiled by C. Salmaggi and A. Pallavisini,
Barnes and Noble, NYNY, publisher(1993).
The second text provides a day-by-day account of the operations.
Your 6th Marine Division is mentioned frequently.
I will break this out for you later. OK ?
Meanwhile, I hope that the above information is beneficial to you.
Louie F. Turner