One narrative I've heard is that Russia is the only petro state in Europe and gets as much as 50% of their revenue from oil and gas. However, Ukraine also have

One narrative I've heard is that Russia is the only petro state in Europe and gets as much as 50% of their revenue from oil and gas. However, Ukraine also have some fossil fuel resources in the eastern and western edges of its territory along with huge gas reserves off of the Crimea peninsula. So maybe Russia is not so much served by the chaos of war as much as it needs to maintain a strangle hold over the gas and oil trade to Western Europe. Annexing the Crimea and the Donbas region gives it control over most of Ukraine's fossil fuel resources.