Wilson Shannon, a former governor of Ohio, was appointed Kansas territorial governor by President Franklin Pierce. In contrast to his predecessor, Andrew H. Reeder, Shannon was outspoken in his proslavery stance and even failed to defend the town of Lawrence from a proslavery raid in May 1856. The "Bleeding Kansas" era began during Shannon's term in office, as the Pottawatomie Massacre and other threats of violence emerged. Admitting failure, Shannon left the territory on June 23, 1856 and his resignation was tendered on August 18, 1856. Still, Shannon's 9.5 month tenure was the longest of any of Kansas Territory's embattled governors.
