The paper covers the performances, skills, and kinds of knowledge demanded of an infantry rifle squad leader to maintain an organized and effective fighting unit under campaign conditions and to set an example as a leader for his men. It covers personal hygiene and field sanitation, the maintenance of minimal fighting and existence loads, water supply and consumption, combat feeding and nutrition, sleep requirements and the effects of sleep loss, prevention of malaria, prevention and treatment of motion sickness, prevention and recognition of combat exhaustion, and maintenance of vigilance under fatigue and stress. (Authors/LY)