Today in History—February 8: The Battle That Turned the Tide in the Pacific

On this day in 1943, with World War II well underway, the Imperial Japanese Navy evacuated its 10,000 remaining troops from the island of Guadalcanal. Allied forces had finally secured control of the southern Solomon Islands, a strategic victory six brutal months in the making.

This evacuation marked Japan’s first major land defeat in the Pacific, signaling a shift from Japanese expansion to Allied advantage for the first time since the start of the war.

The Japanese attack on Pearl Harbor had drawn the United States into World War II, and December 7, 1941, still occupies a conspicuous place in the American consciousness. But the attack on Hawaii was just one element of what U.S. Pres. Franklin Delano Roosevelt—in his “date which will live in infamy” speech—accurately called “a surprise offensive extending throughout the Pacific area.”

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That same week, Japanese forces also struck Malaya, Hong Kong, the Philippines, Thailand, Guam, and Wake Island. The Empire of Japan spent the first half of 1942 consolidating its control in the Pacific.

Adm. Yamamoto Isoroku, the architect of the Pearl Harbor attack, stated, “In the first six to twelve months of a war with the United States and Great Britain, I will run wild and win victory upon victory. But then, if the war continues after that, I have no expectation of success.”

His prediction proved precise. Six months after Pearl Harbor, Japan’s first-line carrier fleet was destroyed at the Battle of Midway. It halted Japan’s naval momentum, creating an opening for what was to follow at Guadalcanal.

A month later, Japanese forces occupied Guadalcanal and began building an airfield. The island sits astride the sea lanes between the U.S. West Coast and Australia, and the airfield would have put Japanese planes within striking range of the major Allied base at Port Moresby in Papua New Guinea.

Allied planners moved fast. On August 7, 1942, the U.S. Marine Corps executed its first major amphibious landing of the war at Guadalcanal. The Marines quickly gained control of the airstrip (which became known as Henderson Field).

The response, when it came, was fierce. The Japanese were adept at night fighting, and Allied forces paid a steep price to maintain their fragile foothold. So many ships were sunk in the course of the battle that the waters between Guadalcanal and Florida Island became known as Ironbottom Sound.

In the end, the Allies demonstrated that they could reinforce the island faster than the Japanese. By holding Henderson Field throughout the campaign, they were able to assert air superiority over the entire theater.

Guadalcanal was where momentum changed hands. It gave the Allied forces the initiative in the Pacific—but it would take two and a half more years of bloody fighting to bring the war to a conclusion.

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