"Doughboy" was a
popular nickname for the American infantryman during World War I. Though the origins of the term are not certain, the nickname was still in use as of the early 1940s, when it was gradually replaced by "G.I." as the following generation enlisted in World War II.
It was famously used by Al Capone as he was speaking to
Jimmy Darmody in the 2010s
Drama "Boardwalk Empire" sentence below.