. "blockade preventing shipping reaching German controlled North Sea seaports" . "commercial blockade" . "Blockade of Germany" . . . "Allied Blockade of Germany" . "naval blockade of Germany" . . "Blockade of Europe" . "Allied blockade" . "Allied Powers:" . "blockade of the ports" . . . "last war" . "Blockade of Germany" . . "they had done" . "blockade of the German Empire" . "economic blockade" . "Central Powers:" . "British naval blockade" . "Allied naval blockade of the Central Powers" . . . . "British blockade" . "imposed" . "blockade of Germany" . "blockade that hurt the German war effort in the First World War" . "Blockade" . "British naval blockade of Germany" . "blockade of German ports" . "naval blockade" . "blockade" . "United States" . "British blockade of Germany" . . . "Allied blockade and trade embargoes" . . "blockade of Germany in World War I" . "United Kingdom" . "Allied naval blockade" . "First" . "blockade Germany" . "German naval blockade" . "blockaded Germany" . . "Germany was blockaded" . "blockading" . "enforced the blockade" . "Allied blockade of Germany" . . . . "blockaded German access to the North Sea and the Atlantic" . "German blockade" . "blockading Germany" . "Allied victory" . "blockade of German maritime trade" . .