Russia is meanwhile re-supplying and re-inforcing from the East, most of the time.

However, one can only pack a specific amount of troops and supplies within the same area and time. That's why Belgorod remains a major…

Russia is meanwhile re-supplying and re-inforcing from the East, most of the time. That is: from Volgograd via Rostov to Luhansk.

However, one can only pack a specific amount of troops and supplies within the same area and time. That's why Belgorod remains a major staging point.