Quote Originally Posted by zuzu-bq View Post
If I remember correctly, that was just the war of the magi, wich Scholars were also included. The calamity was a flood bought by the abuse of WHM powers.
The Calamity you're talking about was brought about by the Elementals after the War of the Magi threatened the consumption of their aether and their very existence. They brought forth the Elemental of Nihility who in turn ended the Amdapori outright and flooded Eorzea.