John William De Forest (May 31, 1826 – July 17, 1906) was an American soldier and writer of realistic fiction, best known for his Civil War novel Miss Ravenel's Conversion from Secession to Loyalty.
De Forest was born in Seymour, Connecticut, (then called Humphreysville), the son of a prosperous cotton manufacturer. He did not attend college, but instead pursued independent studies, mainly abroad, where he was a student in Latin, and became a fluent speaker of French, Italian, and Spanish. While yet a youth, he spent four years traveling in Europe, and two years in the Levant, residing chiefly in Syria. In 1850, he again visited Europe, making extensive tours through Great Britain, France, Italy, Germany, Greece, and Asia Minor. From that time, he wrote short stories for periodicals, having already authored several books.
One of his earliest works, The History of the Indians of Connecticut, from the Earliest known Period to 1850, shows his interest in history. Written from 1847 to 1850, The History of the Indians of Connecticut is critical of the settlers treatment of the Pequots and of King Philip's War, which is somewhat surprising given the early date of the scholarship. The non-fictional work also foreshadows De Forest's later fiction in its subject, realism, and occasional violence.
The honorary degree of A. M. was conferred upon him by Amherst College in 1859.
With the advent of the American Civil War, De Forest returned to the United States. As a captain in the Union Army, he organized a company from New Haven, the 12th Connecticut Volunteers. He served constantly in the field until January 1865, taking an active part under Maj. Gen. Godfrey Weitzel's command in the southwestern states, and under Philip Sheridan in the Shenandoah Valley.