Final answer:
The United States gained the advantage of using the islands to stage an attack on Japan during World War II.
Step-by-step explanation:
The advantage that the United States gained from taking control of islands in the Pacific from Japan was that they used the islands to stage an attack on Japan during World War II. One example of this was the Battle of Iwo Jima, where the United States captured the island and used it as a strategic base to launch further attacks on the Japanese mainland. By gaining control of these islands, the United States was able to gain a tactical advantage and shorten the distance between their forces and Japan, ultimately leading to the end of the war.
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