Final answer:
The purpose of the German blockade in World War I was to defeat Britain by preventing supplies from reaching it before the U.S. could offer substantial assistance.
Step-by-step explanation:
The purpose of the blockade during World War I by Germany was To defeat Britain before U.S. troops arrived. Britain and Germany both utilized blockades as a strategy to limit each other's resources. The German decision to blockade was based on the belief that by cutting off supplies from the United States to Britain, it would force Britain to exit the war before American forces could significantly intervene. Germany faced a dire situation with food shortages and believed that enforcing such a blockade, even at the risk of provoking the United States, could lead to a swift victory by precipitating British surrender.