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.
No
Yes, the allies.
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.
who/
yes
The free world won the cold war.
No. The battle had no clear winner.
The allies defeated the central powers
Because it lasted longer than that
No one.... World War 3 either falls short of a winner, or the whole world ends. World War 4 would be fought with sticks and stones.
There wasn't a clear winner of the 30 Year War. The results of the war included the decline of feudalism, rise of the Swedish Empire, and Habsburg supremacy was curtailed.
There wasn't one. It was cancelled due to World War 2.