Charles B. Flick was born around 1842 in Philadelphia, Pennsylvania, to Charles Flick. His father was a cabinet maker who owned $75 of personal property by 1860. The family lived in Kensington, Pennsylvania, until the 1850s, when they moved to Galena, Illinois. By the early 1860s, he was working as a chair maker. He married Mary Ladd on August 7, 1862, and their daughter Fanny was born on December 24, 1862.
He enlisted in the Union army on August 5, 1862, and he mustered in as a private in Company A of the 96th Illinois Infantry on September 5. According to his service records, he was 5 feet, 8 inches tall, with black hair and hazel eyes. The regiment took part in the Battle of Chickamauga and the Battle of Lookout Mountain. According to his captain, he contracted chronic diarrhea in January 1863 “while on a march and in line of duty.” He spent the next six months recovering.
He returned to the company in August 1863, but he was still “unable for duty.” His condition worsened in September 1863, and he was diagnosed with phthisis pulmonalis. He was discharged for disability on December 2, 1863. He died in Louisiana, Missouri, on January 31, 1864.