The 7th Kansas Cavalry Regiment (also known as "Jennison's Jayhawkers") was a cavalry regiment that served in the Union Army during the American Civil War.
It mustered in for three years under the command of Colonel Charles R. Jennison.
The regiment was attached to Department of Kansas to June 1862.
2nd Brigade, Cavalry Division, Army of the Mississippi, to November 1862.
1st Brigade, Cavalry Division, XIII Corps, Department of the Tennessee, to December 1862.
2nd Brigade, Cavalry Division, XVI Corps, Army of the Tennessee, to March 1863.
Cavalry Brigade, District of Corinth, 2nd Division, XVI Corps, to June 1863.
3rd Brigade, 1st Cavalry Division, XVI Army Corps, to August 1863.
1st Brigade, 1st Cavalry Division, XVI Corps, to February 1864.
Unattached, 1st Cavalry Division, XVI Corps, to June 1864.
1st Brigade, 1st Cavalry Division, District of West Tennessee, to September 1864.
The 7th Kansas Cavalry mustered out of service at Fort Leavenworth on September 29, 1865.
Moved to Humboldt, Kansas, January 31, and duty there until March 25.
Moved to Fort Leavenworth, Kansas, March 25; then to Columbus, Kentucky, May 18-June 2, and to Corinth, Mississippi, June 7, escorting working parties on Mobile & Ohio Railroad and arriving at Corinth July 10; then moved to Jacinto and Rienzi, Mississippi, July 18–28.
Reconnaissance to Jacinto and Bay Springs and skirmish August 4–7.
Grant's Central Mississippi Campaign October 31, 1862, to January 10, 1863.
Operations in northern Mississippi and western Tennessee against Chalmers October 4–17.
Operations on Memphis & Charleston Railroad against Lee's attack November 28-December 10.
Veterans on furlough February 4-March 4; then moved to St. Louis, Missouri, March 12.
Big Blue and State Line, Westport, October 23.
Skirmish McKinzie's Creek, near Patterson, April 15, Ordered to Omaha, Nebraska, July 18; thence to Fort Kearney and duty there until September.
Moved to Fort Leavenworth, Kansas, arriving September 14.