Why did a German you-boat why did a German you-boat sink the passenger ship lusitania the passenger ship lusitania?

The German U-boat sank the passenger ship Lusitania on May 7, 1915, because it was believed to be carrying munitions and supplies for the Allied forces during World War I. The attack was part of Germany's unrestricted submarine warfare policy, which aimed to cut off supplies to Britain. The sinking resulted in the deaths of 1,198 people, including 128 Americans, and stirred public outrage, contributing to shifting sentiments in the U.S. towards involvement in the war.