Which principle of war ensures concentration of effort for every objective under one responsible commander?

The principle of war that ensures concentration of effort for every objective under one responsible commander is unity of command. This principle emphasizes the importance of having a single designated leader in charge of operations to streamline decision-making, coordination, and resource allocation. By consolidating authority and responsibility under one commander, unity of command enables clear communication and cohesive strategies, particularly in complex military operations where multiple units and objectives are involved. This focus prevents conflicting orders and contributes to a more effective and efficient execution of a military campaign.

In contrast, unity of effort pertains more to collaboration among different branches or entities working towards a common goal, which can occur even without a single authority, thus making it less focused on command hierarchy. Command authority addresses the rights of personnel to direct or influence operations without emphasizing the unified command structure necessary for concentrated efforts. Concentration of force, while critical in maximizing combat power, does not inherently guarantee that all elements are under one commander’s oversight and direction.