_____ is the routine contact and interaction between individuals or elements of the U.S. Armed Forces and other nations' armed forces, or foreign and domestic civilian authorities or agencies, to build trust and confidence, share information, coordinate mutual activities, and maintain influence.

Military Engagement often referred to as Rule of engagement, is a term that describes the combat between opposing forces, which may includes naval, air and army (ground soldiers).

It is often considered as a tactical battle, between two opposing forces that are not bigger than a division and it ranges between few hours to days, often between one to two days, and on rare occasion, it can last on maximum of five days.

Most notable rules of engagement in the US are standing ROE (SROE), this is a situation in which the U.S. is not actually at war and thus seeks to constrain military action, and wartime ROE (WROE), this situation do not limit military responses to offensive actions.