Americans entered the war in 1917 by declaring war on Germany. This was due to the attack on Lusitania, the unrestricted submarine warfare on American ships heading to Britain, and Germany encouraging Mexico to attack the USA. A British passenger ship that was sunk by a German U-Boat on May 7, 1915. 128 Americans died.
Answer: During the 1930s, the combination of the Great Depression and the memory of tragic losses in World War I contributed to pushing American public opinion and policy toward isolationism
They broke into groups because they disagreed on how Muhammad's successor should be chosen. Sunnis believe that the successor should be chosen by the people, while the Shiites believe that they should be chosen by God only. Hope this helps!
