Not only was Okinawa by far the bloodiest of the entire Pacific War, it was the LAST major battle of World War II!! "Okinawa was the largest amphibious invasion of the Pacific campaign and the last major campaign of the Pacific War. More ships were used, more troops put ashore, more supplies transported, more bombs dropped, more naval guns fired against shore targets than any other operation in the Pacific. More people died during the Battle of Okinawa than all those killed during the atomic bombings of Hiroshima and Nagasaki. Casualties totaled more than 50,000 Americans, more than 107,000 Japanese and Okinawan conscripts killed, and perhaps 100,000 Okinawan civilians who perished in the battle." Thirty-four allied ships and craft of all types had been sunk, mostly by kamikazes, and 368 ships and craft damaged. The American fleet had lost 763 aircraft. The Japanese lost 7,830 aircraft and 16 combat ships.
The invasion began on 01 April 1945 when 60,000 troops (two Marine and two Army divisions) landed with little opposition. The day began and ended with the heaviest concentration of naval gunfire ever expended to support an amphibious landing. Gathered off the invasion beaches were 10 older American battleships, including several Pearl Harbor survivors—the USS Tennessee, Maryland, and West Virginia—as well as 9 cruisers, 23 destroyers and destroyer escorts, and 117 rocket gunboats. Together they fired 3,800 tons of shells at Okinawa during the first 24 hours. Okinawans had long been resigned to the severe typhoons that sweep their land, but nothing in their experience prepared them for the tetsu no bow —- the "storm of steel" —- as one Okinawan characterized the assault on the island. At 0830 the 7th and 96th Infantry Divisions of the XXIV Corps and the 1st and 6th Marine Divisions of the III Amphibious Corps crossed the Hagushi beaches, with 16,000 troops landing unopposed in the first hour. By nightfall more than 60,000 were ashore.
Although Okinawa was strongly defended by more than 100,000 troops, the Japanese chose not to defend the beaches. The uncontested landings of 01 April were part of the overall Japanese strategy to avoid casualties defending the beach against overwhelming Allied firepower. A system of defense in depth, especially in the southern portion of the island, would permit the 100,000-man-strong Japanese 32nd Army under General Ushijima to fight a protracted battle that would put both the attacking amphibious forces and naval armada at risk. The Japanese dug into caves and tunnels on the high ground away from the beaches in an attempt to negate the Allies' superior sea and air power.
The battle proceeded in four phases: first, the advance to the eastern coast (April 1-4); second, the clearing of the northern part of the island (April 5-18); third, the occupation of the outlying islands (April 10 - June 26); and fourth, the main battle against the dug in elements of the 32nd Army which began on 06 April and did not end until 21 June. Although the first three phases encountered only mild opposition, the final phase proved extremely difficult because the Japanese were well entrenched in and naval gunfire support was ineffective.
On April 6-7, the first use of massed formations of hundreds of kamikaze aircraft called kikusui, or "floating chrysanthemum", for the imperial symbol of Japan, began. By the end of the Okinawan campaign, 1,465 kamikaze flights were flown from Kyushu to sink 30 American ships and damage 164 others. The Japanese had devised a plan to load-up high-speed motorboats with high explosives and have them attack the American Fleet. The boats were hidden in caves up rivers and pulled inside along railroad tracks. The plan never was carried out, however.
The Japanese battleship, Yamato, the largest warship ever built accompanied by the light cruiser Yahagi and eight destroyers, was dispatched to Okinawa on 06 April 1945, with no protective air cover. So badly depleted was the Japanese fleet by this time, Yamato was reported to carry only enough fuel for a one-way trip to Okinawa. Her mission: beach herself at Okinawa and fight until eliminated. The American submarine Hackleback tracked her movements and alerted carrier-based bombers. Vice Admiral Marc Mitscher launched air strikes on April 7 at 10 a.m. The first hits on Yamato were claimed by the carrier Bennington. San Jacinto planes sunk the destroyer Hamakaze, with a bomb and torpedo hit. The light cruiser Yahagi was hit by bombs and went dead in the water. For the next two hours, the Japanese force was under constant attack. Yamato took 12 bombs and seven torpedo hits within two hours, finally blowing up and sinking. Three accompanying destroyers were so badly damaged they had to be scuttled. Four remaining destroyers could not return to Japan. Of Yamato's crew of 2,747, all but 23 officers and 246 enlisted men were lost. Yahagi lost 446; Asashimo lost 330; the seven destroyers, 391 officers and men. There were few Japanese survivors. Losses to the Americans were 10 planes and 12 men. This was the last Japanese naval action of the war.
By 19 April soldiers and marines of the US Tenth Army under LGEN Buckner USA were engaged in a fierce battle along a fortified front which represented the outer ring of the Shuri Line. This fighting contrasted dramatically with the unopposed landings and initial rapid advances of the previous weeks. The Shuri defenses were deeply dug into the limestone cliffs and boasted mutually supporting positions as well as a wealth of artillery of various calibers. As the battle dragged on, American casualties mounted. This delay in securing the island caused great consternation among the naval commanders since the fleet of almost 1,600 ships was exposed to heavy enemy air attacks. The most damage from the Japanese attacks came from operation Ten-Go (Heavenly Operation) which employed mass deployment of the fearsome kamikaze.
American losses mounted as soldiers and marines assaulted points on the Shuri line with the deceptive names of Sugar Loaf, Chocolate Drop, Conical Hill, Strawberry Hill, and Sugar Hill. During the course of the battle American forces were informed of two pieces of dramatic news, one tragic and the other joyous. The first was the death of president Franklin Roosevelt on 12 April and the latter the surrender of Nazi Germany on 8 May.
By the end of May monsoon rains which turned contested slopes and roads into a morass exacerbated both the tactical and medical situations. The ground advance began to resemble a World War I battlefield as troops became mired in mud and flooded roads greatly inhibited evacuation of wounded to the rear. Troops lived on a field sodden by rain, part garbage dump and part graveyard. Unburied Japanese bodies decayed, sank in the mud, and became part of a noxious stew. Anyone sliding down the greasy slopes could easily find their pockets full of maggots at the end of the journey.
Heavy pressure on the Shuri Line finally convinced GEN Ushijima to withdraw southward to his final defensive positions on the Kiyamu Peninsula. His troops began moving out on the night of 23 May but were careful to leave behind rear guard elements that continued to slow the American advance. Japanese soldiers too wounded to travel were given lethal injections of morphine or simply left behind to die. By the first week of June, US forces had captured only 465 enemy troops while claiming 62,548 killed. It would take 2 more weeks of hard fighting and an additional 2 weeks of "mopping up " operations pitting explosives and flamethrowers against determined pockets of resistance before the battle would finally be over. The so called "mopping up" fighting between 23 and 29 June netted an additional 9,000 enemy dead and 3,800 captured. Among the Japanese, the incidence of suicide soared during the final days. An examination of enemy dead revealed that, rather than surrender, many had held grenades against their stomachs, ending their personal war in that manner. General Ushijima committed ritual suicide (hara-kiri) on 16 June, convinced that he done his duty in service to the Emperor. The document ending the Battle of Okinawa was signed on what is now Kadena Air Base on 07 September 1945. Long before the firing stopped on Okinawa, engineers and construction battalions, following close on the heels of the combat forces, were transforming the island into a major base for the projected invasion of the Japanese home islands.
Well, an Okinawa map has been on the fh website since I've been playing, so I assume they are making one. I would hesitate to say it was the last major battle of WWII, soviet invasion of Manchuria was bigger than Okinawa and that was august 9th. In fact on the island of Shimushu soviet's made an amphibious assault on august 18th or so, even though the Japanese had called a cease-fire with the allies. Therefore, the Japanese saw this as an act of defense and didn't surrender until Sept 1st or so. There were over 16,000 men involved. Oooo, also..Japanese should get the 320mm Spigot Mortar which they had on Okinawa (and Iwo Jima)