Old 4th Michigan Infantry
- History of the "Old" 4th with rosters, grave sites, monuments, soldiers stories, and uniforms.
- http://4thmichiganinfantry.com/

4th Michigan Infantry
- History, photos, and officers of the regiment.
- http://www.4thmichigan.com/

24th Michigan Infantry
- Devoted to this Regiment of the Iron Brigade, it focuses on the history of the unit and contains biographies of its soldiers.
- http://www.24th-michigan.org/

12th Michigan Infantry
- Online edition of an early book containing the history and roster of the regiment.
- http://www.memoriallibrary.com/MI/Military/CW12th/

21st Michigan Volunteer Infantry
- History of the regiment and information about the reenactment group.
- http://www.21stmichigan.org

3rd Michigan Infantry History
- Comprehensive source of information about this regiment and the men that served in it.
- http://www.oldthirdmichigan.org/

22nd Michigan Infantry Volunteers
- A history of the "Marching Regiment" in 6 parts.
- http://www.msu.edu/user/potterj/mich.html