The 4th Regiment Illinois Volunteer Cavalry was a cavalry

Cavalry

Cavalry or horsemen were soldiers or warriors who fought mounted on horseback. Cavalry were historically the third oldest and the most mobile of the combat arms...

 regiment

Regiment

A regiment is a major tactical military unit, composed of variable numbers of batteries, squadrons or battalions, commanded by a colonel or lieutenant colonel...

 that served in the Union Army

Union Army

The Union Army was the land force that fought for the Union during the American Civil War. It was also known as the Federal Army, the U.S. Army, the Northern Army and the National Army...

 during the American Civil War

American Civil War

The American Civil War was a civil war fought in the United States of America. In response to the election of Abraham Lincoln as President of the United States, 11 southern slave states declared their secession from the United States and formed the Confederate States of America ; the other 25...

.

Service

The 4th Illinois Cavalry was mustered into service at Ottawa, Illinois

Ottawa, Illinois

Ottawa is a city located at the confluence of the Illinois River and Fox River in LaSalle County, Illinois, USA. As of the 2010 census, the city population was 18,786...

 on September 26, 1861.

It was consolidated with 12th Regiment Illinois Volunteer Cavalry on June 14, 1865.

Total strength and casualties

The regiment suffered 38 enlisted men who were killed in action or who died of their wounds and 4 officers and 192 enlisted men who died of disease, for a total of 234 fatalities.

Commanders

• Colonel Theophilus Lyle Dickey
  Theophilus Lyle Dickey
  Theophilus Lyle Dickey was an Illinois jurist and military leader.-Pre-war life:Born in Paris, Kentucky, Colonel Dickey moved to Macomb, Illinois in 1834 to study law under Cyrus Walker and was admitted to the Illinois Bar in 1835...
  
  - resigned February 16, 1863
• Colonel Martin R. Wallace - mustered out November 3, 1864