What was the costliest war in history?
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The American Civil War was an instance of war.
A war was fought during the American Civil War .
What was the costliest war in history?</s>The [unused1]American Civil War                [unused2] was an instance of war.
What was the costliest war in history?</s>The American Civil War was an instance of war.
What was the costliest war in history?</s>A war was fought during the [unused1]American Civil War                [unused2] .
What was the costliest war in history?</s>A war was fought during the American Civil War .
What was the costliest war in history?</s>war,0,war,war,0,[unused1]American Civil War[unused2],[unused1]American Civil War[unused2],instance of,war,[unused1]American Civil War[unused2],0,[unused1]American Civil War[unused2]
What was the costliest war in history?</s>war,0,war,war,0,American Civil War,American Civil War,instance of,war,American Civil War,0,American Civil War