In Austria we still have conscription and the officer in charge of our company outright said to us during basic training : "This right here fullfills all the criteria of slavery if conscription wasn't explicitly allowed I'd be in jail now!"

Nope. Text book slavery requires either ownership. Or forced labour without renumeration.

Not saying conscription is good. But slavery is a different thing. And using the term lightly is an insult to those who have faced it.