@Jean-Pat Agree with analysis as well.
@Hepps I am most intrigued by the train unit. Train basic movement is 6, it's transport capacity is determined by the # of rail units in a province? Based on the maximum of 6 rail units per territory with 6 provinces in line, a train could theoretically transport 6 infantry units 6 provinces in a single turn. Is my understanding correct?
Would capitals and strategic cities with higher infrastructure would start with 2 rail units to allow both starting trains of the major belligerents to pass-thru in round 1 , whereas the rest of the country would be limited to 1 or 0 rail units.
Where there are bottlenecks I'm assuming the train would only be able to carry the capacity of the lowest rail infrastructure province? For example, if provinces were in line and every province had 3 rail units, but a province in the middle only had 1 rail unit, the train would only be able to carry a single unit thru the full length of the line due to the bottleneck.