One thing that the human kind was doing from the beginning of time is fighting with each other. Many times the fighting got out of hand and consumed the innocent people. Here is a list we compiled of the ten deadliest wars ever. These figures of one million or more deaths include the deaths of civilians from diseases, famine, etc., as well as deaths of soldiers in battle and possible massacres and genocide.
If you like this post also check out the 10 Deadliest Events In Human History (That is Man Made + Natural).