In 1863 and 1864, three Union regiments (146th New York, 140th New York, and 155th Pennsylvania) were issued with Zouave uniforms to reward their proficiency in drill and battlefield performance. Difficulties in supply and replacement meant that Zouave and other exotic militia uniforms tended to be replaced by standard issue uniforms throughout the conflict. However, the tradition remained strong, and the last Union casualty of the fighting in Virginia was reported to be a Zouave of the 155th Pennsylvania, killed at Farmville, Virginia, on the morning of April 9, 1865.