Could someone give me a brief definition of the civil war era? (1 or 2 sentences)

Need answer asap plz! the descriptions of the west wind in the first two sections of “ode to the west wind” are dominated by images of a. violence, death, decay, and burial. c. peace, birth, growth, and blossoming. b. sleep, dreams, fantasy, and reverie. d. translucence, light, color, and radiance.