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9th Regiment, Ohio Volunteer Infantry
File:Flag of Ohio.svg
Ohio flag
Active 1861–1865
Country United States of America
Allegiance Union
Branch Volunteer Army, American Civil War
Type Infantry
Size ~950 soldiers at outset of the war
Nickname Die Neuner (the Ninth)
Engagements Western Theater of the American Civil War
Robert L. McCook

The 9th Ohio Infantry (Die Neuner) was an infantry regiment that was a part of the Union Army during the American Civil War. The members of the regiment were primarily of German descent and the unit was the first almost all-German unit to enter the Union Army.


Between 1836 to 1860, four German militia units were formed in Cincinnati, these units were the beginning of the 9th OVI. This unit was organized in Cincinnati, Ohio, from hundreds of men who had volunteered for duty in response to a call to arms by President Abraham Lincoln and subsequently by Ohio Governor William Dennison. Nearly 1,500 men, mostly Germans, volunteered for this unit in the first three days. Col. Robert L. McCook a local lawyer, trained and drilled the new soldiers at Camp Harrison and Camp Dennison, both near Cincinnati.

The initial field officers were as follows on April 23, 1861:

  • Colonel Robert L. McCook
  • Lieutenant Colonel Karl Sonderson
  • Major Frank Mattice
  • Regt. Doctor Karl Krause
  • Asst. Doctor Rudolph Wirth
  • Adjutant August Willich

Gustav Bergmann, a Cincinnati public school teacher, was the first person to join the unit. The city gave $250,000.00 for the organization of this unit.[1]

The regiment lost during its three-year term of service six officers and 85 enlisted men killed and mortally wounded. It also lost two officers and 60 enlisted men to disease, for a total of 153.



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