The Battle of Tarawa largely fought from November 20 to November 23, 1943. It was the second time the United States was on the offensive (the Guadalcanal Campaign had been the first), and the first offensive in the critical central Pacific region.
It was also the first time in the war that the United States faced serious Japanese opposition to an amphibious landing. Previous landings met little or no initial resistance. The 4,500 Japanese defenders were well-supplied and well-prepared, and they fought almost to the last man, exacting a heavy toll on the American Marines.
Only one Japanese officer, 16 enlisted men and 129 Koreans were alive at the end of the battle. Total Japanese and Korean casualties were about 4,713 dead. For the U.S. Marine Corps, 990 were killed and a further 2,296 wounded. A total of 687 U. S. Navy personnel also lost their lives in the landing attempts, giving a total of 1,677 American dead. Although the United States forces were seven times larger than the defending garrison, the Japanese were able to inflict substantial damage upon the U.S. force.
But the lessons learned at Tarawa would be applied in the Battle of Iwo Jima.