sentences:  The 105th Pennsylvania Infantry was founded by Amor McKnight, a lawyer and resident of Brookville, Pennsylvania who became one of the state's earliest responders to President Abraham Lincoln's call for volunteers to defend Washington, D.C. following the fall of Fort Sumter to Confederate States Army troops in mid-April 1861.After honorably completing his three months' service as captain of Company I with the 8th Pennsylvania Infantry and honorably mustering out on July 29, 1861, McKnight was then authorized by the state in early August to raise a new regiment.Recruiting for the 105th Pennsylvania then began and was completed that same month.