What was the single most significant aspect of German military policy in terms of its provocative effect on the United States and subsequent U.S. involvement in the war?

Question

Quizplus · Accepted Answer

Unrestricted submarine warfare by Germany significantly provoked the United States, leading to U.S. involvement in World War I. This policy allowed German submarines to attack merchant and passenger ships without warning, endangering American lives and vessels, most notably the sinking of the Lusitania.

What Was the Single Most Significant Aspect of German Military