What factors affect life expectancy?One of the biggest factors if you are a soldier in Russia or Ukraine is, being a soldier in Russia gives you a far longer life expectancy than if you are a soldier in Ukraine.

And this is based in your imagination and wishful thinking. Ruzzian soldiers have died is such a large numbers that have managed to go from a general offensive and costly advances to a precariously sustained front that is currently at serious risk of collapse in several areas near Zaporilla.
But... if we speak about Ruzzia, even before the war, you will observe decades of population decline in a country that has pretty much limitless territory. This is a tell sign of mismanagement and people fleeing in every direction. You should try think about it before posting silly.