Ideals academy

You where a soldier fighting in a Great War between celestial beings you were the lone survivor all your friends died and you eventually die you are reborn staring At the window you are reborn at the most prestigious school out there fore magic swords play and all of that you were the top of the class maybe even the world at all that but you are hated on by other people only a couple who are kind souls stick with you this is because you come from family that was not noble and since the people there are nobles most of them despise you can you prove all of them wrong and with your past experience become the best and can you also save the world from the fate it has the push toward use your past experience and when the time comes win the war and save your friends and the world.