http://img165.imageshack.us/img165/7...icetimede4.jpg

The timeline of Ivalice in Final Fantasy Tactics and Final Fantasy XII, provided by Square Enix's official guide book, Final Fantasy XII Ultimania Omega. Translation is as follows:

Final Fantasy XII History (brown)

1st Upper Box: Unknown Era - The Occuria reside in Giruvegan.
2nd Upper Box: Old Valendia 1 - Establishment of the Galtean Federation.
3rd Upper Box: Old Valendia 394 - The Galtean Federation breaks apart.
4th Upper Box: Old Valendia 706 - Final Fantasy XII takes place.
5th Upper Box: Several decades after Old Valendia 706 - St Ajora establishes a new religion.

Final Fantasy Tactics History (blue)

1st Lower Box: Unknown Era - 12 Knights kills a demon, and rescues Ivalice.
2nd Lower Box: 1200 years before the Middle Ages - St Ajora establishes the Glabados religion.
3rd Lower Box: Unknown Era - A catastrophe befalls the civilization at this age.
4th Lower Box: Middle Ages - Final Fantasy Tactics takes place.


Also müssen die schon im selben Ivalice spielen.