Brown University professor Megan Kate Nelson teaches a class about guerilla warfare, which is largely characterized by its tactics, including ambushes and surprise raids on unsuspecting troops and towns. She talks about the guerrilla soldiers fighting on both the Union and Confederate sides during the Civil War. These small bands of men on horseback were nimble and difficult to capture, especially Confederate guerrillas who often did not wear uniforms and blended back into the population after an attack

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