Union soldier refers to one who fought for the Union army during the American Civil War. However, several synonyms can represent Union soldier based on certain contexts. Some of these synonyms include Federal soldier, Unionist, Yankee soldier, Bluecoat, and Union man. Federal soldier indicates a broad description of all soldiers who served in the military forces of the Federal government. Unionist emphasizes the loyalty of the soldier to the country rather than the army, while Yankee soldier draws on the characterization of the Union soldiers as northeasterners. Meanwhile, Bluecoat and Union man are informal synonyms that refer to the distinctive blue coats worn by Union soldiers and their allegiance to the Union, respectively.