I've been curious for awhile how their came to be staunch Ephesine/Cyrillian Christians in certain areas to the point where they eventually rejected Chalcedon.
How this came to pass in Egypt seems obvious to me, given the reality of such figures as Saint Cyril, Saint Dioscorus, and Saint Timothy as their heads.
How it came to pass in Abyssinia/Ethiopia/Eritrea also appears obvious, them having been ecclesiastically dependent upon the Egyptians for so long.
However, I am led to wonder about the West Syrians and the Armenians.
Given that it would seem that in the first half of the 5th century that the Syrians and/or the Christians of the Diocese of the East and/or the Patriarchate of Antioch appear to have been predominantly Theodorean, I am having a hard time understanding how their came to be such a significant party of Anti-Chalcedonian Cyrillians that they developed their own parallel Patriarchate of Antioch, constituted about more or less half of the Christians in that region, and continue to exist today as the Syriac Orthodox Church. Can anyone explain this?
Also, I don't really know much about how the Armenians came to be so Cyrillian. It doesn't seem that they had the same history with Theodoreanism, but obviously their Christological formulation would have to have been to some degree imported to be so clearly and blatantly Cyrillian. Can someone explain how this came to be?