One of the main arguments for the Germans attacking Moscow during World War II was that it was a transportation (mainly railroad) "hub" for the Soviet Union, and if captured, would seriously disrupt Soviet communications. At that time, Moscow was the capital of the Soviet Union so this would make sense, "all other things being equal".
But during the time of the Tsars (after Peter the Great), the capital was at St. Petersburg, not Moscow.
So did the rule in the first paragraph apply during the time of the Tsars when "all other things weren't equal? Were Russian communications more decentralized during the earlier period?
Or was it a situation where most of the Soviet Union's communications were built between 1918 and 1941 so that what happened under the Tsars had little impact on the World War II situation? Or could it be that St. Petersburg and Moscow were close enough together so that there wasn't much of a difference between a Moscow and St. Petersburg hub?