Complete the crossword, then click on "Check" to verify your answer. Click on a number in the grid to get a free letter and/or see the clue.

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Across: 1. This concept does not necessarily imply a massing of forces, but rather having them so disposed as to be able to unite to deliver the decisive blow when and where required. 3. Roads, railways, inland waterways, air routes, or any other facility in a theatre of operations suitable as a route for the movement of men, animals or material. The military term for the various means of transmitting orders and information. 5. In military usage, primarily information about the enemy. 8. This concept, which regards the notion of effort, implies a balanced employment of forces, and a judicious expenditure of all resources with the object of achieving an effective concentration at the decisive time and place. 9. Based on team spirit, it entails the co-ordination of all units so as to achieve the maximum combined effort from the whole. 10. A most effective and powerful influence in war, its moral effect is very great. By its use, results out of all proportion to the effort expended can be obtained, and in some operations, when other factors are unfavourable, it may be essential to success. 11. The process of sypplying the requirements of armed forces. 12. The art of moving or disposing forces so as to impose upon the enemy the place, time and conditions for fighting preferred by oneself. Its object is to ensure that when one's forces meet the enemy on the battlefield they will do so at an advantage. 14. Modern war demands a high degree of this particular concept to enable pre-arranged plans to be altered to meet changing situations and unexpected developments. It calls also for physical mobility of a high order, both strategically and tactically, so that our forces can be concentrated rapidly and economically at decisive places and times. 16. This kind of action is the necessary forerunner of victory; it may be delayed, but until the initiative is seized victory is impossible. 17. Before maintaining the aim, this action is required. 18. The art of directing forces in contact with the enemy; the conduct of operations on the actual battlefield. 19. A sufficient degree of this principle is essential in order to obtain freedom of action to launch a bold offensive in poursuit of the selected aim.

Down: 2. "The organization, discipline and well-being of men and the movement and maintenance of men and materials". 4. A group of depots from which an army in the field is supplied with personnel and material. 6. In British usage, 1939-45, this kind of operations involve more than one of the three fighting services. 7. Success in war depends more on this mental faculty than on physical qualities. 13. Operations involving the landing or embarkation of troops 15. Traditionally, the "art of moving and quartering troops" (Oxford Dictionary). The official British definition is now, "The science of planning and carrying out the movement and maintenance of forces".