In 1854 and 1861 there was a series of violent civil confrontations in Kansas territory. They call it Bleeding Kansas because of the blood shed by pro-slavery and anti-slavery groups.
B) only changes his or her opinion on a policy issue when a major event happens
Machine Guns, The USS Monitor, Fenian Ram, The Maxim Gun, The First Bulletproff Vest Made Of Heavy Metal Plates, Gun Silencer, First Tanks, Nuclear Bombs, The Laser Is Demonstrated For The First Time,