Was there a clear winner in World War I?
Their was no clear winner of world war 1. Some people say that world war 2 was part of world war 1. The above answer is misleading, as it could suggest that an undefeated Germany signed a very damaging peace treaty - which obviously wasn't the case. Moreover, in its present form the answer could be taken to support the 'stab-in-the-back' theory, though I don't think that's the intention. The Central Powers were defeated and two of them - Austria-Hungary and the Ottoman Empire broke up.
Because there were many battles during the war, going by the saying: "We've won the battle, but not the war," both British North America (BNA) (Canada) and the Americans won battles, but since there was no major battle with a definite winner, and only many small battles which they had their share of winning, there was no clear winner.
European nations began to think twice about interfering with US international trade No no no no ^^^^^^ The four major consequences of the War of 1812 were : The U.S. manufacturing improved from having to make their own goods, Native American resistance, it increased American patriotism, and (I don't know about this one much) there was no clear winner in the war.
Battle of Antietam (Battle of Sharpsburg) Sep 17 1862 On the day there was no clear winner on the battlefield, even though there were 23,000 casualties. But the strategic winner was the North. General Lee withdrew his troops from Maryland and was never seen there again. President Lincoln also made political capital out of the battle which helped to keep Great Britain out of the war.