US Army Sergeant rank insignia, in use 1942-1955 (colour change to these colours in 1942, colour change to present appearance in 1955)
Derived from w:Image:US Army E-5.svg with colour changes per w:Image:WWIISGT.gif. Authoritative reference: http://www.tioh.hqda.pentagon.mil/Rank_page/History_of_Enlisted_Ranks.htm