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The protection she provided made it possible for this vital coastwise and Caribbean traffic to continue despite German submarine menace and freed larger destroyer types for the hunter-killer operations which defeated the U‑boats in the Atlantic .
 Caribbean, German
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Caribbean, German