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1st Regiment Illinois Volunteer Cavalry
Illinois flag
Active July 3, 1861 to December 27, 1862
Country United States
Allegiance Union
Branch Cavalry

The 1st Regiment Illinois Volunteer Cavalry was a cavalry regiment that served in the Union Army during the American Civil War.


Companies "A" to "G" of the 1st Illinois Cavalry were mustered into service at Alton, Illinois, on July 3, 1861. Among their initial officers was future Washington philanthropist David P. Jenkins, who served as the regiment's first major. Companies "I," "H" and "K" were mustered at Alton at later dates and never served with the main body of the regiment. The original companies served as guards for supply trains and depots until mustered out on July 14, 1862. The remaining companies served independently.

The last company was mustered out on December 27, 1862.

Total strength and casualties[]

The regiment suffered 17 enlisted men who were killed in action or who died of their wounds and 26 enlisted men who died of disease, for a total of 43 fatalities.[1]


  • Colonel Thomas A. Marshall - mustered out July 14, 1862, with the main body of the regiment.[2]

See also[]

  • List of Illinois Civil War Units
  • Illinois in the American Civil War