The results of ballistic surveys of American casualties in Korean fighting were presented in a previous paper1 that also stressed the urgent need for body armor by combat personnel and discussed its probable effectiveness. The first field trial of body armor in Korea (1951) indicated that it could be worn without interference with combat performance, that the soldiers unanimously desired it, and that an appreciable decrease in casualty rate and also in the severity of wounds received could be anticipated. Since that time body armor has become standard equipment for both Army and Marine Corps field forces and has been used by large numbers of troops under combat conditions for a significant period. It is believed that the value of the armored vest in the total medical effort to conserve the fighting strength of field forces has been demonstrated and that this report on it is not premature.
Holmes RH, Enos WF, Beyer JC. MEDICAL ASPECTS OF BODY ARMOR USED IN KOREA. JAMA. 1954;155(17):1477-1478. doi:10.1001/jama.1954.03690350019006