Before the U. S. entered the war, what strategy did the Germans put in place to hinder U. S. aid to the European Allied powers?

U-Boats were a key asset of the German military. They saturated the Atlantic and were very difficult to avoid, attacking and sinking thousands of merchant ships and killing tens of thousands of seamen.

Explanation:

in 1859, brown and 21 of his followers attacked and occupied the federal arsenal in harper's ferry. their goal was to capture supplies and use them to arm a slave rebellion. brown was captured during the raid and later hanged, but not before becoming an anti-slavery icon. abolitionist and insurrectionist

explanation: