I'd hold a lesser of two evils justify it. The government already dictates what you need to do. Is it the commanded act of killing people that you think takes it too far?
They dictate what you do and don't do. Taxes take a portion of your time as well since you need to work longer. I didn't see how it's categorically different. Just a difference of extent.
So than what makes conscription too far? Would non military mandatory government service be permissible? How long would that duration need to be in order to be unacceptable?
No that would not be acceptable either. There's a massive difference between jury duty and military service. Theres frequency/amount, and the basic fact that jury duty is a domestic thing.