Complex sentence: Silas Stillman Soule (July 26,1838--April 23,1865) was a Massachusetts radical abolitionist, Kansas Territory Jayhawker anti-slavery militant, and later an officer in the Colorado cavalry volunteers during the American Civil War.
Split into simpler sentences: Silas Stillman Soule (July 26,1838--April 23,1865) was a Massachusetts radical abolitionist and Kansas Territory Jayhawker anti-slavery militant. Later, he became an officer in the Colorado cavalry volunteers during the American Civil War.