Swapping Chalkis for Thessalonica

[Jolt]

Antioch was formed even after Thessalonica was built and was only finished being built after the game starts, yet it was still a major city. So why wouldn't Thessalonica be?

We need an EB member to come and tell us whether Thessalonica was a major city during 272bc.

I'm not sure if Thessalonike was formed before Antioch. In any case, Thessalonike never played an important role in history in this time, as has Antioch (Being the capital of the Seleucids). Thessalonike was just an autonomous city-state and little more I know through until Roman days.

EDIT: Seeing Thalakos post in the Open Beta Thread, actually Antioch was founded a year before Thessalonike.