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The following is a bibliography of sources for Union Regiments including histories, letters, diaries, memoirs, and biographies held and maintained by History & Genealogy at St. Louis County Library. 

Regiments are organized Alphabetically by State and then numerically by the regiment number.  Regiments without a number are listed first.  Some collections have been included.  

Branches are organized Alphabetically. 

Call # references St. Louis County Library Dewey decimal number as found in library catalog. 

Title reference title of the publication. 

Example: 

Maine      
Rgt Branch Call # Title
2nd Cavalry R 973.7441 S655S The 2nd Maine Cavalry in the Civil War : a history and roster
7th Infantry R 973.7349 H953M Maine roads to Gettysburg : how Joshua Chamberlain, Oliver Howard, and 4,000 men from the Pine Tree State helped win the Civil War's bloodiest battle