Only the United States stood in Japan's path. The U.S. Pacific Fleet at Pearl Harbor was the only force capable of challenging Japan's navy, and American bases in the Philippines could threaten lines of communications between the Japanese home islands and the East Indies. Every oil tanker heading for Japan would have to pass by American-held Luzon. From these needs and constraints, Japan's war plans emerged. First, its navy would neutralize the American fleet with a surprise attack on Pearl Harbor. Japan would also seize America's central Pacific bases at Guam and Wake islands and invade the Philippines. With American naval power crippled, Japan's military would be free to seize Burma, Malaya, Singapore, and the Dutch East Indies in a series of rapid amphibious operations. Japan would then establish a defensive ring around its newly conquered empire by fortifying islands in the south and the central Pacific. Japan's leaders were convinced that Americans, once involved in the European war, would be willing to negotiate peace in the Pacific.
To block Japanese ambitions, the United States Army had scant resources. Two small forces constituted the heart of the American land defenses in the Pacific--the garrison in the Territory of Hawaii and General Douglas MacArthur's command in the Commonwealth of the Philippines. Both were peacetime organizations, whose days were given to rounds of ceremonies, inspections, and languid training. Officers and their wives occupied evenings and weekends with rounds of social activities and golf, while the soldiers enjoyed more earthy pleasures in the bars and brothels of Honolulu or Manila.
Yet these forces would face overwhelming odds in the event of war. The thousands of islands that comprised the Philippines lay 8,000 miles from the American west coast, but only 200 miles from Japanese-held Formosa. To defend them, General MacArthur had the equivalent of two divisions of regular troops--16,000 U.S. regulars and 12,000 Philippine Scouts. He could call on additional thousands of Philippine militia, but they were untrained and ill equipped. Lt. Gen. Walter C. Short's Hawaiian command held 43,000 Army troops, including two infantry divisions, coast artillery, air corps, and support troops. Thus, in ground forces, the United States had the equivalent of three divisions in the Pacific to stand in the path of the Imperial Japanese Army.
American strategists had developed two plans to counter possible Japanese aggression--one for the Navy and another for the Army. The Navy planned to fight across the central Pacific for a climactic and decisive battle with the Japanese fleet. The Army saw no way to save the Philippines and favored a strategic defense along an Alaska-Hawaii-Panama line. Writing off the Philippines, however, was politically impossible, and as war drew closer frantic efforts were made to strengthen the commonwealth's defenses. Both MacArthur and Army Chief of Staff General George C. Marshall overestimated the chances of their own forces and underestimated the strength and ability of the Japanese. In particular, they grossly exaggerated the power of a new weapon, the B-17 "Flying Fortress" bomber, a few of which were rushed to the Philippines in the last days of peace.
All of the efforts proved to be too little, too late. The Japanese war plan worked to perfection. On 7 December 1941, Japan paralyzed the Pacific Fleet in its attack on Pearl Harbor. In the Philippines, Japanese fliers destroyed most of MacArthur's air force on the ground. Freed of effective opposition, Japanese forces took Burma, Malaya, Singapore, and the Dutch East Indies in rapid succession. By March 1942 the Japanese had conquered an empire. Only MacArthur's beleaguered American-Filipino army still held out on the main Philippine island of Luzon.
A Japanese army had landed in northern Luzon on 22 December 1941 and began to push southward toward Manila. At first, MacArthur was inclined to meet the Japanese on the beaches. But he had no air force, and the U.S. Navy's tiny Asiatic fleet was in no position to challenge Japan at sea. The U.S. regulars and Philippine Scouts were excellent troops but were outnumbered and without air support. Giving up his initial strategy of defeating the enemy on the beaches, MacArthur decided to withdraw to the Bataan Peninsula. There he could pursue a strategy of defense and delay, shortening his lines and using the mountainous, jungle-covered terrain to his advantage. Perhaps he could even hold out long enough for a relief force to be mounted in the United States.
But too many people crowded into Bataan, with too little food and ammunition. By March it was clear that help from the United States was not coming. Nevertheless, the American-Filipino force, wracked by dysentery and malaria, continued to fight. In March President Roosevelt ordered MacArthur to escape to Australia. He left his command to Lt. Gen. Jonathan Wainwright and to Maj. Gen. Edward King, who on 9 April was forced to surrender the exhausted and starving Bataan force. Wainwright continued to resist on the small fortified island of Corregidor in Manila Bay until 6 May under constant Japanese artillery and air bombardment. After Japanese troops stormed ashore on the island, Wainwright agreed to surrender Corregidor and all other troops in the islands. By 9 May 1942, the battle for the Philippines had ended, though many Americans and Filipinos took to the hills and continued a guerrilla war against the Japanese.
The courageous defense of Bataan had a sad and ignominious end. Marching their prisoners toward camps in northern Luzon, the Japanese denied food and water to the sick and starving men. When the weakest prisoners began to straggle, guards shot or bayoneted them and threw the bodies to the side of the road. Japanese guards may have killed 600 Americans and 10,000 Filipino prisoners. News of the Japanese attack on Pearl Harbor had outraged the American people; news of the "Bataan Death March" filled them with bitter hatred.
By May 1942 the Japanese had succeeded beyond their wildest expectations. A vast new empire had fallen into their hands so quickly, and at so little cost, that they were tempted to go further. If their forces could move into the Solomon Islands and the southern coast of New Guinea, they could threaten Australia and cut the American line of communications to MacArthur's base there. If they could occupy Midway Island, only 1,000 miles from Honolulu, they could force the American fleet to pull back to the west coast. In Japanese overconfidence lay the seeds of Japan's first major defeats.
The Tide Turns
Japanese fortunes turned sour in mid-1942. Their uninterrupted string of victories ended with history's first great carrier battles. In May 1942 the Battle of the Coral Sea halted a new Japanese offensive in the south Pacific. A month later the Japanese suffered a devastating defeat at the Battle of Midway in the central Pacific. Now American and Australian forces were able to begin two small counteroffensives--one in the Solomons and the other on New Guinea's Papuan peninsula. The first featured the Marine Corps and the Army; the second, the Army and the Australian Allies.
American resources were indeed slim. When MacArthur arrived in Australia in March 1942, he found, to his dismay, that he had little to command. Australian militia and a few thousand U.S. airmen and service troops were his only resources. The Australian 7th Division soon returned from North Africa, where it had been fighting the Germans, and two U.S. National Guard divisions, the 32d and the 41st, arrived in April and May. MacArthur had enough planes for two bomber squadrons and six fighter squadrons. With only these forces, he set out to take Papua, while Admiral Nimitz, with forces almost equally slim, attacked Guadalcanal in the Solomon Islands.
Of all the places where GIs fought in the Second World War, Guadalcanal and the Papuan peninsula may have been the worst. Though separated by 800 miles of ocean, the two were similarly unhealthful in terrain and climate. The weather on both is perpetually hot and wet; rainfall may exceed 200 inches a year, and during the rainy season deluges, sometimes 8 to 10 inches of rain, occur daily. Temperatures in December reach the high eighties, and humidity seldom falls below 80 percent. Terrain and vegetation are equally foreboding--dark, humid,
jungle-covered mountains inland, and evil-smelling swamps along the coasts. Insects abound. The soldiers and marines were never dry; most fought battles while wracked by chills and fever. For every two soldiers lost in battle, five were lost to disease--especially malaria, dengue, dysentery, or scrub typhus, a dangerous illness carried by jungle mites. Almost all suffered "jungle rot," ulcers caused by skin disease.
Guadalcanal lay at the southeast end of the Solomons, an island chain 600 miles long. Navy carriers and other warships supported the landings, but they could not provide clear air or naval superiority. The marines landed on 7 August 1942, without opposition, and quickly overran an important airfield. That was the last easy action on Guadalcanal. The carriers sailed away almost as soon as the marines went ashore. Then Japanese warships surprised the supporting U.S. naval vessels at the Battle of Savo Island and quickly sank four heavy cruisers and one destroyer. Ashore, the Japanese Army fought furiously to regain the airfield. Through months of fighting the marines barely held on; some American admirals even thought that the beachhead would be lost. But gradually land-based aircraft were ferried in to provide air cover, and the Navy was able to return. As the Japanese continued to pour men into the fight, Guadalcanal became a battle of attrition.
Slowly American resources grew, while the Japanese were increasingly unable to make up their losses. In October soldiers of the Americal Division joined the battle; in November the Navy won a smashing victory in the waters offshore; and in early 1943 the Army's 25th Infantry Division was committed as well. Soldiers now outnumbered marines, and the ground forces were reorganized as the XIV Corps, commanded by Army Mail Gen. Alexander M. Patch. As the Japanese lost the ability to supply their forces, enemy soldiers began to starve in the jungles. But not until February--six months after the initial landing--was Guadalcanal finally secured.
Meanwhile, 800 miles to the west on the eastern peninsula of New Guinea, another shoestring offensive began. Even after the Battle of the Coral Sea, the Japanese persisted in their efforts to take Port Moresby, a strategic town on New Guinea's southern coast. In late July 1942 they landed on the north coast of the huge, mountainous island and began to make their way south toward Port Moresby, across the towering Owen Stanley Mountains. Almost impassable in normal circumstances, the trail they followed was a quagmire under constant rain. Supply became impossible; food ran short; fever and dysentery set in. Defeated just short of their goal by Australian defenses, the Japanese retreated. Meanwhile, MacArthur had decided to launch a counteroffensive against the fortified town of Buna and other Japanese-held positions on the northern coast. He sent portions of the Australian 7th and U.S. 32d Divisions over the same mountainous jungle tracks earlier used by the Japanese. The result was the same. By the time his troops reached the northern coast, they were almost too debilitated to fight. Around Buna and the nearby village of Gona the Japanese holed up in coconut-log bunkers that were impervious to small-arms and mortar fire. The Americans lacked artillery, flamethrowers, and tanks. While they struggled to dig the defenders out, malnutrition, fever, and jungle rot ravaged the troops. Like the troops on Guadalcanal, the Aussies and the men of the 32d barely held on.
The Japanese also faced serious problems. Their commanders had to choose between strengthening Guadalcanal or Buna. Choosing Guadalcanal, they withdrew some support from the Buna garrison. Growing American air power made it impossible for the Japanese Navy to resupply their forces ashore, and their troops began to run short of food and ammunition. By December they were on the edge of starvation. Here the battle of attrition lasted longer, and not until January 1943 was the last Japanese resistance eliminated.
Buna was costlier in casualties than Guadalcanal, and in some respects it was an even nastier campaign. The terrain was rougher; men who crossed the Owen Stanleys called that march their toughest experience of the war. The Americans lacked almost everything necessary for success--weapons, proper clothing, insect repellents, and adequate food. "No more Bunas," MacArthur pledged. For the rest of the war his policy was to bypass Japanese strongpoints. When the battles for Guadalcanal and Buna began, the Americans had insufficient strength to win. American strength increased as the battle went on. Over the next three years it would grow to overwhelming proportions.
Twin Drives to American Victory
As late as 1943 the American Joint Chiefs of Staff had not adopted a clear strategy for winning the war in the Pacific. Early in the war they assumed that the burden of the land fighting against Japan would fall on Chinese forces. The bulk of Japan's army was deployed in China, and Chinese leaders had an immense manpower pool to draw on. But supplying and training the Chinese Army proved to be an impossible task. Moreover, fighting in China did not lead to any strategic objective.
Instead, the hard-won successes in the Solomons and Papua and the growing strength of MacArthur's and Nimitz's forces gave the Joint Chiefs the means to strike at the Japanese in the Pacific. They decided to launch two converging offensives toward the Japanese islands. Using Army ground forces, land-based air power, and a fleet of old battleships and cruisers, MacArthur would leapfrog across the northern coast of New Guinea toward the Philippines. Nimitz, using carrier-based planes and Marine and Army ground forces, would island-hop across the central Pacific. The strategy was frankly opportunistic, and it left unanswered the questions of priorities and final objectives.
At the heart of the strategy were the developing techniques of amphibious warfare and tactical air power. Putting troops ashore in the face of a determined enemy had always been one of war's most dangerous and complicated maneuvers. World War II proved that the assault force needed air and sea supremacy and overwhelming combat power to be successful. Even then, dug-in defenders could take a heavy toll of infantry coming over the beaches. Special landing craft had to be built to bring tanks and artillery ashore with the infantry, and both direct air support and effective naval gunfire were essential. MacArthur's leaps up the northern coast of New Guinea were measured precisely by the range of his fighter-bombers. The primary task of Nimitz's carriers was to support and defend the landing forces. As soon as possible after the landings, land-based planes were brought in to free the carriers for other operations.
The islands of the central Pacific had little resemblance to the fetid jungles of Guadalcanal and New Guinea. Atolls like Tarawa or Kwajalein were necklaces of hard coral surrounding lagoons of sheltered water. Where the coral rose above water, small narrow islands took form. These bits of sand furnished little room for maneuver and frequently had to be assaulted frontally. Larger islands like Guam and Saipan were volcanic in origin, with rocky ridges to aid the defense; the shrapnel effect of shell bursts was multiplied by bits of shattered rock.
In November 1943 Nimitz's island-hopping campaign began with his assaults on Betio in the Tarawa Atoll and at Makin a hundred miles north. It was a costly beginning. Elements of the Army's 27th Infantry Division secured Makin with relative ease, but at Betio the 2d Marine Division encountered stubborn and deadly resistance. Naval gunfire and air attacks had failed to eliminate the deeply dug-in defenders, and landing craft grounded on reefs offshore, where they were destroyed by Japanese artillery. As costly as it was, the lessons learned there proved useful in future amphibious operations. Like MacArthur, Nimitz determined to bypass strongly held islands and strike at the enemy's weak points.
During January 1944 landings were made in the Marshalls at Kwajalein and Eniwetok followed by Guam and Saipan in the Marianas during June and July. Because the Marianas were only 1,500 miles from Tokyo, the remaining Japanese carriers came out to fight. The resulting Battle of the Philippine Sea was a disaster for the Japanese. In what U.S. Navy pilots called "the great Marianas turkey shoot," Japanese carrier power was effectively eliminated.
Almost as soon as the Marianas were cleared, the air forces began to prepare airfields to receive new heavy bombers, the B-29s. With a range exceeding 3,000 miles, B-29s could reach most Japanese cities, including Tokyo. In November 1944 the Twentieth Air Force began a strategic bombing campaign against Japan, which indirectly led to one of the bitterest island fights of the war. Tiny Iwo Jima, lying 750 miles southeast of Tokyo, was needed both as an auxiliary base for crippled B-29s returning from their bombing raids over Japan and as a base for long-range escort fighters. The fight for the five-mile-long island lasted five weeks, during February and March 1945, and cost more than 25,000 dead--almost 6,000 Americans of the 4th and 5th Marine Divisions and 20,000 Japanese.