>

Just like Germany and Japan in latter part of World War II.
We should push Russia's energy revenues to pre 1900s. >

*Pre-1790s >

Back to using whale oil. >

How long Russia can sustain ruinous war with Ukraine is question no one can answer with any certainty but one thing is for sure.  Russia will be ruined financially for foreseeable future when the war finally come to an end. >

It can "fight" indefinitely but the quality of that fight will keep dropping - less supplies, less equipment, less training, more surrenders, more defeats.