Are you walking about the org that was known as Wagner? They aren't forced to fight. They do get incentives to fight that's for sure. They defeated the most hardcore nazis, which we openly support (azov batallion) in Bahkmut.

Why should the president of an invaded country have to negotiate with the invaders? They can leave and then it’s all over.

Are you serious? Do you even know why this war is happening? Ukraine, which we couped in 2014, was killing and still is killing ethnic Russians in the 2 independent republics FOR NO REASON. They also continually plot and execute acts of terrorism against Russia on I'd say a minimum, at least one act every two weeks. Their SBU (their version of CIA) was started by OUR CIA. The feds bragged about it on NYT.