Second Battalion of the IX Coast Artillery Corps demonstrating the hollow square formation used in the event of a street - NARA - 533463.jpg
en
Second Battalion of the IX Coast Artillery Corps demonstrating the hollow square formation used in the event of a street NARA 533463, March 1918 photographs, Riot control, United States Army in World War I, Military exercises of the United States, US National Archives series: American Unofficial Collection of World War I Photographs, 1917 - 1918, Images from the National Archives and Records Administration, Second Battalion of the IX Coast Artillery Corps demonstrating the hollow square formation used in the event of a street riot
commons
ja
第9沿岸砲兵軍団の第2大隊。通りの上で使用された中空の正方形を実証している。 第9沿岸砲兵軍団第2大隊。 中空の正方形の形式を示す。 第9沿岸砲兵軍団第2大隊。
commons_translated
riot control window covering