Between the beginning of Magician and the setting for the original Midkemia FRP campaign, there's about 500 years unaccounted for.
During this time, there are a total five riftwars.
FAQ answers attributed to Raymond E. Feist are copyright by Raymond E. Feist.
It should also be born in mind that the answer given was only applicable on the date written, and to a specific question. You may find further, similar questions, in the FAQ.