Who does the term doughboy refer to?

The term "doughboy" primarily refers to American soldiers who served during World War I. The origin of the term is debated, but it is believed to have derived from the appearance of soldiers' uniforms, which resembled dough, or possibly from the buttons on their uniforms. Over time, it became a colloquial term for U.S. infantrymen, symbolizing their role in the war. The term has since become a historical reference to that era of American military service.