Talk:O 21-class submarine

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Military history: Maritime / Dutch / European / German / World War II

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This article has been checked against the following criteria for B-class status:
Referencing and citation: criterion not met Coverage and accuracy: criterion not met Structure: criterion met Grammar and style: criterion met Supporting materials: criterion met

Associated task forces:
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	Maritime warfare task force
	Dutch military history task force
	European military history task force
	German military history task force
	World War II task force

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