Amongst military personnel, cognitively demanding tasks are expected to be performed under intensive stress. According to the U.S. Department of Defence, 87% of military personnel reported experiencing at least some stress due to work. Stress severely impacts cognitive processes as it has led to the concept of mental resilience. This is the extent to which cognitive functions can endure or adapt to the effects of stress. Cognitive resources are necessary for the self-regulation of effort, attention, and emotional control. Some environmental stressors that military personnel face are heat, cold, and altitude. This affects their cognitive processes, such as attention and working memory.