Ms Bernie Maguire:

The principles of international law refer to the consent of the parties. Peacekeeping missions must operate within the consent of the host nation and conflicting parties ensuring the legitimacy and support of the mission. Impartiality is also a principle. Peacekeepers are required to remain neutral, unbiased and to engage in activities that do not favour one side or the other.

As for the use of force, peacekeeping forces should primarily engage in peacekeeping operations and should only use force in self-defence or to protect civilians against imminent threat. With peace enforcement, there is not always the consent of the parties. That is the key difference. Where the lives of civilians are at stake, the UN or the EU will make a decision that a peace-enforcement mission should be launched.