The preparation of the force.
D000064:Acclimatization; D000222:Adaptation, Physiological; D000337:Aerospace Medicine; D002940:Circadian Rhythm; D003020:Clothing; D004526:Efficiency; D004739:England; D006801:Humans; D007167:Immunotherapy; D008887:Military Medicine; D008889:Military Personnel; D010809:Physical Fitness; D011315:Preventive Medicine