I see the Alexandrian Empire Reaches the Caspian Sea. I think your Thracian Empire would have moved Up the Don and Down the Volga to reach the Caspian also.
[even if they control less of the Caucuses, below the upside V]
This will allow the Thracian's to trade with Bactria, which reaches out to Cathay, giving Thrace a share of the Silk Road.
Hmm...interesting point. Could you demonstrate this on a map perhaps? I'd like to include that in the timeline.
Thanks in advance