If you're asking about sovereign nations, then false.
WWI changed the face of warfare forever. Warfare became utterly impersonal with the invention of the tank, fighter airplane and automatic machine gun. The allied powers emerged victorious and powerful, both economically and militarily. The German Empire, on the other hand was utterly decimated, culturally, militarily, and economically. WWI lead to a halt in imperialistic policy and the formation of the League of Nations, the ineffective predecessor to the United Nations. The main end result of WWI was Adolf Hitler's rise to power and WWII.
The assassination of President Lincoln was just one part of a larger plot to decapitate the federal government of the U.S. after the Civil War. Lincoln never lived to enact this policy.
i think the answer will be
B:
an oath of loyalty.
