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
Occupation of the Hainburger Au Occupation of the Hainburger Au The Occupation of the Hainburger Au wetlands in December 1984 marked a turning point for awareness in German speaking central Europe and was of great significance for the development of democratic processes in Austria. The Hainburger Au is a large naturally occurring flood plain bordering the River Danube at, and upstream of, Hainburg in Lower Austria. It is a short distance to the east of Vienna's main airport. Since 1996 it has been part of the Danube-Auen National Park. In February 1983 the of the World Wide Fund for Nature (WWF) began a campaign under