As an Alliance committed to the rule of law, ensuring the legal interoperability of multinational armed forces is fundamental to protecting and defending the indivisible security and the common values of NATO. In that respect, following many years of conducting joint operations, missions and exercises together, and despite the numerous challenges, the Alliance has demonstrated a high standard in complying with international law in the course of its military operations. This shared experience amongst Allies and partners has provided many lessons for future operations that have been translated into practical measures to assist the nations in meeting their international obligations and to go even beyond what might be required from them. Simply put, adherence to international law is not only a legal requirement; it is part and parcel of NATO’s core values and legitimacy.