The Sinking of Lusitania: Justified or Not? Great Britain, with the Allied Forces, and Germany, with the Triple Alliance, were the major forces that fought in World War I. Nearly one year following the commencement of the Great War, German U-boats started began sinking British ships using their technique of approaching the vessels underwater and out of sight. They used this tactic because Great Britain had been breaking the laws and hurting the German people. The main event that caught America’s eye was the tragic sinking of a British luxury ocean liner flying an American flag. 1,198 of the 1,959 people aboard were killed in this tragic event. Americans were outraged because 128 people had been killed who lived in the United States. The sinking