Slavery played the central role during the American Civil War. The primary catalyst for secession was slavery, especially Southern political leaders' resistance to attempts by Northern antislavery political forces to block the expansion of slavery into the western territories.
Ooo simple
<span>Only Congress has the right to declare war, but the president is the supreme.</span>
Well, in the first World War, Germany lost the war because of the Jewish. Another reason would be that Hitler used myths and lies, and used anti-semitism to his advantage, with myths like how the Jews killed Jesus Christ(when it was actually the Romans) So because of religious prejudice and a long history of anti-semitism made them prime targets.