This map from 1916 shows the German submarine war zone in World War One at that time. Note that legend says: Shaded portion indicates the war zones proclaimed by German Feb 18, 1915.

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Size: 3604px × 5190px
Photo credit: © Ivy Close Images / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: german, germans, great, map, maritime, submarines, subs, sumarines, war, wartime, world, wwi, wwi, zones