Another far-reaching tactical innovation was being launched at this time as Lieutenant Commander Frederick J. Lewis (MSC) USN, supervised a joint Army-Navy three-month field test of Marine armored vests made of lightweight plastics. A glance at the past reveals that body armor had never quite vanished from modern warfare. European cavalry lancers wore steel cuirasses throughout the 19th century. During the American Civil War two commercial firms in Connecticut manufactured steel breastplates purchased by thousands of Union soldiers. So irksome were the weight and rigidity of this protection, however, that infantrymen soon discarded it. World War I dated the first widespread adoption of armor in the 20th century. The idea was suggested when a French general noted that one of his men had survived a lethal shell fragment by virtue of wearing an iron mess bowl under his beret. France led the way, and before the end of 1915 steel helmets were being issued to all armies on the Western Front. When the United States entered the war, General John J. Pershing put in a request for body armor. Some 30 prototypes using steel or aluminum plates were submitted but rejected. In every instance the weight and rigidity were such that too high a price in mobility would be paid for protection.[263] [263] This section, except when otherwise noted, is derived from the following sources: Rpt of Joint Army-Navy Mission at HQMC, 9 Nov 51, in G-4 Files; _Instructional Information, Vest, Armored_, M-1951, G-4 Files, HQMC; LCdr F. J. Lewis (MSC) USN, ltr of 21 Jun 54; Capt Louis Kirkpatrick (MC) USN, ltr of 22 Jun 54; Capt D. G. McGrew, ltr of 2 Jul 54; LtCol G. A. Hardwick, USMC, ltr of 30 Jun 54. During the 1930’s new possibilities were opened up by developments in lightweight plastics. The Japanese attack at Pearl Harbor interrupted experiments that were not resumed until 1943. Then a new start was made with the formation of a joint Army-Navy committee headed by Rear Admiral Alexander H. Van Kueren and Colonel George F. Doriot. Wound statistics indicated that the great majority of fatal wounds were received in a comparatively small area of the body. The following table shows the regional frequency: NON-FATAL FATAL _Percent_ _Percent_ Head 10 Head 20 Chest 10 Chest 50 Abdomen 10 Abdomen 20 Upper Extremity 30 Upper Extremity 5 Lower Extremity 40 Lower Extremity 5