padisha emperor said:
But the idea of classement of 10 battles in the world HIstory is not realy bright : it depends of the conception of each country, of their point of view, etc... (for me Poitiers is more decisive than spanish invincible armada's defeat...La Marne, or Castillon are more important than Gettysburg...)
It doesn't depend of the conception of each country, it depends on which were most significant , as in: had it turned out the other way the world as we know it would be a very different place.
The Battle of Thermopylae, 5th Century BC, What if the Spartan's hadn't been able to hold back the Persians? Hellenic culture might not have survived, there may never have been an Alexander. Western Civilization as we know it would not exist.
The Battle of Tours, 732 AD, What if the Moslem's had won? Again Western Civilization as we know it would not exist.
The Battle of Borodino, 1812, Technically a victory for Napoleon, but at great loss. What if Napoleon had routed the Russians and maintained sufficient military capacity to march on St. Petersburg? With the Russians out of the game, and his Grand Armee intact, would he have ever lost?
The Battle of Kursk, 1943, the largest armored engagement in human history, that last offensive action of the German armor on the eastern front for the rest of the war. What if the Germans had crushed the Red Army? At this point the war was still winnable for the Germans, afterwards it was not. A Cold War between the USA and England on one side and a greater Germania on the other?
Incidentally, the destruction of the Chinese invasion fleet by the Kamikazee wasn't a military engagement, but it certainly was historically important. Same with the Spanish Armada.