Military geography, one of several subsets within those broad confines, concentrates on the influence of physical and cultural environments over political-military policies, plans, programs, and combat/support operations of all types in global, regional, and local contexts. Key factors displayed in table 1 directly (sometimes decisively) affect the full range of military activities: strategies, tactics, and doctrines; command, control, and organizational structures; the optimum mix of land, sea, air, and space forces; intelligence collection; targeting; research and development; the procurement and allocation of weapons, equipment, and clothing; plus supply, maintenance, construction, medical support, education, and training.