"History is the lie commonly agreed upon." What did Voltaire mean by this quote?

Winners make history, its a fact. With that said winners also are the ones who write the history down so when he says "lie" he means, for example, if a kingdom conquers another empire mainly for selfish purposes, they can write history or the story down about how that empire was evil and abominable it had to be destroyed or something like that to justify what they had done. When he says "agreed upon" he means that the winners write the history they agree with what was written so the lie goes on and eventully if told something enough you might even start to believe it! Shocking isn't it?