I think it depends on the level of the individual. We talk about troops as being a homogeneous group, but actually there's a very strict hierarchy and there's a need-to-know aspect. You don't want the master corporal who is riding in a convoy on a Coyote to be concerned about these other issues; you want him to be trained, to be knowledgeable that there are going to be bombs on the side of the road that'll go off remotely, or whatever, and that's what you want focused on.
The answer to that question is in the rules of engagement that are issued by the Chief of the Defence Staff on behalf of the government. They describe the situation you are going into and the levels of force, the escalation of force, and the parameters on the use of force for you. In fact, soldiers carry around a little card that tells them that's their authority to shoot or not shoot, or whatever.
The results of the information requests that I've got back from DND about what their level of knowledge is led me to understand that there were basically two briefings given to people who were deployed. They were on the rule of law, international law, and the laws of war in general terms.