I was really hoping that the Russian command structure would finally appear, but alas.
What does he mean by that, you ask?
The Russian Fronts, aka Army Groups.
Northwestern Front (until August 1915) Northern Front (from August 1915)
Western Front (from August 1915)
Southwestern Front
Romanian Front
Caucasus Front
They were using Fronts right from the start. The chain of command went STAVKA, (GHQ in game)--> Front--> Army-->Corps.