Loyalty is not merely a moral virtue; it is a great military necessity. To establish and to cultivate a state of mutual understanding from which will flow mutual loyalty born of mutual confidence (page 9) are prime obligations of command. Within the limits of responsibility and resultant authority, individual initiative will follow. On a foundation of intelligent cooperation and resolute determination, the acts of the lowest commander will be in accordance with the desires of the highest. This, in effect, will constitute unity of effort, accomplished through the vesting of command in a single head. The final aim of mutual understanding is attained when, in the absence of specific instructions, each subordinate commander in the chain acts instinctively as his immediate superior, if present, would have him act, and also cooperates intelligently with commanders occupying coordinate positions on the same echelon. For this reason there is need, on all echelons, of a complete grasp of the significance of the relationship between immediate superior and immediate subordinate, and of the obligations of each to the other. The proper relationship is such that a subordinate, even though separated from his commander, can confidently take action as if the latter were present. To this end, the competent commander will earlier have cultivated the personal relationship between his immediate superior and himself, and between himself and his subordinates. It is through such close relationship that mutual understanding is best developed and harmony promoted, so that intelligent and cordial unity of effort may exist among the personnel of a command. The commander, however competent, necessarily relies on his subordinates. Recognizing the psychological factors involved, he will therefore manifest confidence in their abilities, display sympathetic interest in their efforts, and evince pride in their achievements. He will also exercise patience with the mistakes which will inevitably occur, without condonement, however, of disaffection, neglect, or carelessness. The commander may reasonably expect, by the same token, that this attitude will characterize his immediate superior.