In connection with freedom of action, the commander will also make adequate provision for logistics support. In its unrestricted sense, the term "logistics" relates to the supply and movement of a military force, and to such related matters as the disposition and replacement of ineffective personnel. Logistics measures, as comprehended in the development of the basic plan, exclude movement primarily of a strategical or tactical nature, but include movement related primarily to supply and similar matters. This requirement gives rise to the necessity for logistics measures which may further call for operations such as to provide fuel oil and supplies at rendezvous X and Y, and tender facilities at port D. An incidental requirement will relate to movements of train ships. Hence, the commander formulates these, also, and includes them in his list of operations for later assignment as logistics tasks. (Page 166). Fuel oil may likewise be required at Port D, but if the commander knows that ample fuel oil is in store there, no operation to cover this feature is required of him. The solution of logistics problems is further discussed hereafter (page 179). * * * * * The commander has now, it may be presumed, evolved all of the operations that his analysis tells him are appropriate with respect to correct physical objectives, advantageous relative positions, and freedom of action. Therefore, he now studies all of these operations from the viewpoint of the remaining element--proper apportionment of fighting strength. This consideration involves, initially, a determination of what forces will be necessary to carry out the operations listed. The commander thereby determines the requirements, as to forces, for each such operation. For example, the operation "to locate an enemy force" may require the use of several types of naval vessels and aircraft. The commander determines what method of search is best for the purposes of this specific operation; thereafter, he determines what forces are necessary to conduct the search. The procedure has previously been indicated (in the Principle of the Proper Means to be Made Available--page 34). In this study the commander will often find it necessary to divide some of the more extensive operations into component parts, suitable for later assignment as tasks for subordinates. Fundamentally, there is no difference between an operation and a task, except that the latter includes also the idea of imposing on another person, or assigning to him, a definite amount of work or duty (page 84). At this stage, then, the commander deals with components suitable for performance by available weapons, in the usual units, or combinations of units, in which they are effective. Of course, when an operation meets this requirement without subdivision into components, it need not be subdivided.