In attempting to identify federal census records for Private John Snowden (reported MIA and presumed KIA 18 July 1863) of the famous 54th Massachusetts Volunteer Infantry, I've run across an interesting mystery. If you are interested in the US Civil War and US Black history, maybe you can help! The Find a Grave memorial notes that another John Snowden whose Pennsylvania death certificate confirms that he is Black served in the Union Army. I've noted the 1890 US Veterans Schedules where a John Snowden appears, but haven't had a chance to confirm if some of the regiments enlisted men of color during the US Civil War. I don't have access to Fold3 to see if they might have additional information. Thank you for any additional sourced research you can provide!