Cassimere Churchill was born on October 20, 1840 in Alexander, Genesee Co., New York to Cullen Dyer and Caroline Brown Churchill. He enlisted in Company E, 9th Cavalry Regiment New York on December 7, 1861. He died on September 3, 1862 as result of a wound inflicted in Alexandria, Virginia.
Further information about this individual or organization may be available in the Special Collections Research Center Wiki: http://scrc.swem.wm.edu/wiki/index.php/Cassimere Churchill.
Rootsweb site on Civil War Soldiers, Ancestry.com "Ancestors of John and Sylvia Wilson and Others" as of June 25, 2000 and the description by seller.