Clarence P. Townsley was born in De Kalb, New York, on September 24, 1855, a son of Elias P. Townsley and Louise (Thompson) Townsley.[1] Townsley's grandfather Gideon had served as the town's postmaster, was elected town supervisor, and operated a tannery close to the Oswegatchie River. Townsley's father also served as postmaster and town supervisor, and was elected to the New York State Assembly.[2]
Townsley served initially with the 4th Field Artillery Regiment.[1] After a brief tour in California, Townsley returned to upstate New York, then to several Coast Artillery posts. He spent three years teaching drawing at West Point.[4]
Townsley commanded the Coast Artillery District of Pensacola beginning in 1905. In 1909, he was promoted to lieutenant colonel and assigned to command the Coast Artillery School and the Artillery District of Chesapeake Bay.[5]
In 1912, Townsley was appointed as superintendent of the United States Military Academy.[1] He was still serving as West Point's superintendent at the outbreak of World War I, and continued in this post until July 1916, when he was promoted to brigadier general and returned to Coast Artillery duty. As the Army prepared for entry into the war, Townsley commanded the South Atlantic Coast Artillery District, then was assigned to the Philippines, where he inspected the artillery emplacements of Manila and Subic Bays.[5]
Recalled to the United States to train and command the 30th Division, Townsley was promoted to temporary major general before leading his division to France.[1] Townsley later returned to the United States because of illness, and was on medical leave at Walter Reed Hospital until just before the Armistice of 11 November 1918 that ended the war. He briefly commanded the North Pacific Coast Artillery District before retiring in December 1918.[5]
In 1891, Townsley married Marian Howland (1862-1925).[7] They were the parents of three children, Marian (1891-1983), Helen Howland (1895-1990), and Clarence.[7] Helen Townsley was the wife of Major General Leven Cooper Allen.[8] Clarence P. Townsley Jr. (1896-1975) was a career officer in the U.S. Army and attained the rank of brigadier general.[9]