WW2 Reproduction US Army Officers American Infantry Overseas Garrison Side Cap American Officer Garrison Cap with black and gold piping. These are great reproductions of the overseas cap worn by Officers of the US Army during WW2, with Officer status denoted by the black and gold piping. The hats found their origins in WW1, with this style adopted throughout WW2. Great reproductions of the iconic US Garrison Cap, with the Officer piping of black and gold.