Chemical Corps affiliation with the corps. The Chemical Corps branch insignia consists of a cobalt blue, enamel benzene ring superimposed over two crossed gold retorts. The branch insignia, which was adopted in 1918 by the fledgling Chemical Service, measures .5 inches in height by 1.81 inches in width. Crossed shells with a dragon head was also commonly used in France for the Chemical service. The Chemical Warfare Service approved the insignia in 1921 and in 1924 the ring adopted the cobalt blue enamel. When the Chemical Warfare Service changed designations to the Chemical Corps in 1946 the symbol was retained. The regimental
Au Peninsula Au Peninsula The Au Peninsula (German: Halbinsel Au) is located on the Swiss "Zürichsee" lake shore in the municipality of Au, Canton of Zürich. Au is a peninsula situated on the southwestern Zürichsee lake shore on the slope of the Zimmerberg plateau. In its south, between the headland and the peninsula, a small lake respectively a reed landscape to the north is situated. The area is located in the municipality of Au between Wädenswil and Horgen. Located on the Au peninsula, the Neolithic site named "Wädenswil–Vorder Au" was one of the numerous sites of Prehistoric pile dwellings around Zürichsee. At