I think Mark alluded to the term "volunteerism". I think that once you sign up for active service, volunteerism ends. You have that commitment and the obligation to operate within the constraints.
One thing that came to mind as you asked that question was that I wanted to highlight three published ethical obligations that we as Canadian Forces members have when in service to the country and deployed on operations. One is to respect the dignity of all persons. That's pretty straightforward, I believe. Another is to serve Canada before self. Mark rightly highlighted that. Another is to obey and support lawful authority. That's the manner in which you operate at all times, be it domestically or abroad, on operations in service to your country.
When you look at those three published and accepted ethical principles, it's quite clear the way that all of our personnel will operate willingly, knowing that they've made that commitment to each other but also to Canadians and the Government of Canada.