The 161st New York Volunteer Infantry Regiment participated in a war that began shortly after which presidents inaguration?
161st New York Volunteer Infantry Regiment: The 161st New York Volunteer Infantry Regiment was an infantry regiment of the Union Army during the American Civil War. American Civil War:  The result of a long-standing controversy over slavery, war broke out in April 1861, when Confederates attacked Fort Sumter in South Carolina, shortly after Abraham Lincoln was inaugurated.
Abraham Lincoln