#7 The Fundamental Principle of “Unity of Effort” in Multinational Operations – Dr Regeena Kingsley No-matter which command arrangement a Multinational Operation (MNO) assumes or what Command and Control (C²) system is imposed (see blog “#6 Managing Multinational Complexity – Command & Control (C²)“), the true effectiveness of the multinational enterprise will ultimately hinge on one factor: the unity of the actors in the effort towards achieving the common purpose of the operation. In military terminology this is known as unity of effort. Unity of Effort According to the U.S. Department of Defense Dictionary of Military Terms,