“With what troops?”
Russia has long had compulsory military service.
Most Russian adult males have gone through basic training I believe.
The Red Army had about 12 million troops in 1945.
Russia is a demographic basket case . Their birth rate is among the lowest in the world. Their abortion rate is the highest in the world. According to their own FSB, nearly 4 million people left the country in Q1. And 23 million have left the country since 2019. They can compel service all they want, but if the military age folk won’t stick around, well.....