Tacitus wrote about persecution of Christian by Nero ,mentioning about Christ in context of belief of Christians. There is no mention about Christ in any secular literature,in Roman tax records, or among recordings of any Scientist, or Philosopher, or among any religious leaders of his time. Even Christian record of him starts with account of Paul. He may have been a story woven by Paul to start a cult.
There are thousands of battle like Battle of Tours which could have easily changed history, had they had different outcome.
That is why I think that this title of 5 battles which changed history is a pointless heading. Battle of Alesia did not had any effect on 3/4 of the world because Roman empire never affected 3/4 of old world in any profound way.
Most of important battles are those which resulted in demographic or Religious change , as those changes are permanent
@jhungary
Had Turks not massacred every Greek they could found in Asia Minor, Anatolia would have been a Hellenic province.
Had Mongols not massacred everything in their path in Central Asia, that region would never have become Mongoloid.
Conquest of Two Americas , as colonization of North America provided resource base for West to assert their supremacy.
Battle fought by Muhammad, and Umayyads.
and so on.....................