You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Marshall_Islands

Context:
In the months before the attack on Pearl Harbor, Kwajalein Atoll was the administrative center of the Japanese 6th Fleet Forces Service, whose task was the defense of the Marshall Islands.

Question:
What was the mission of the 6th Fleet Forces Service?

defense of the Marshall Islands