What did Germany do to the US during World War 1?

Answer 1

During World War I, Germany engaged in unrestricted submarine warfare, which led to the sinking of ships, including those carrying American passengers, most notably the Lusitania in 1915. This aggressive tactic contributed to rising tensions between Germany and the United States. Ultimately, these actions, along with other factors, prompted the U.S. to enter the war on the side of the Allies in 1917. Germany's actions were seen as a direct threat to American lives and interests, significantly influencing public opinion in favor of intervention.