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
This Is What You Came For France, Hungary, Italy, the Netherlands, Norway, Portugal and Slovakia. The song has reached the top 10 in all except three of the countries it has charted in. Taylor Swift performed "This is What You Came For" on the piano for the first time live at the United States Grand Prix in Austin, Texas, on 22 October 2016. Swift then performed an acoustic guitar version at the DirecTV Super Saturday Night in Houston, Texas, on 4 February 2017. This Is What You Came For "This Is What You Came For" is a song by Scottish DJ and record producer Calvin Harris,