Draft out a simple time line to take care of your regions and let Terry take care of the World. If you need a time line that spans a bit more then the area you are gaming in, then expand your window to suit. Keep in mind that most games don't give you a time line, so don't get locked into it, just use it as a climbing device and go wild.
A general theme of the time line: Something happens to push the World closer to chaos, then there is a stabilizing effect. Something pushes the World closer to Chaos, then there is a stabilizing effect. Nothing pushes back the inevitable Chaos, just holds it off a while longer.
Or just put the Official time line aside. In truth your PC's don't have to be movers and shakers, sometimes the average adventure spends his/her life fighting lugroki, evil lords and necromancers with a passion for conquest. Some times your Players decide what you do. My current party is not up to an Unlife adventure, so I have returned to the standard Forest crawl and dungeon crawl and currently mountain crawl. So a number of the really dangerous happenings I don't even bother with.
I have had parties run into 5084. It was a bit challenging as my party at the time were all over the place. Still fun. That was when I really made Shadow World mine, if you will.