mutual aid agreement

基本解釋

If I write a ticket to an officer on another agency, and a mutual aid agreement causes us to work together in a major event, would I rather he or she get my back, or be thinking about that ticket I wrote them a few weeks ago?
FORBES: Q: What are some cultural faux pas in police departments?
IR--An alliance is a formal treaty or agreement between states, commonly for the purpose of mutual aid in the event of war against a common enemy.
ECONOMIST: No to NATO expansion