D. All of the above
The Guadalcanal campaign lasted for months and American troops fought through swampy marshes and took heavy casualties from the Japanese, as the Japanese were very unlike other troops, in which they did not know the art of surrendering, and was forced to fight to the death for the "Rising Sun". As there were swampy marshes on the island, tropical diseases was rampant, as well as troop movements were slowed to a crawl.
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Answer:
spanish?
Explanation:
Spanish empire was too large to control.
Spain had lots of interior problems and this was more important than colonies.
