Drum Taps a collection of Civil War poetry Walt Whitman is a poet from the 1800s that has written a book called Leaves of Grass. In his collection Drum Taps Whitman speaks about the Civil War and its effects on the American people. Many scholars, and myself believe that throughout this collection he changes his tone, theme and imagery. Whitman’s brother was wounded and admitted into a hospital. Upon hearing this news, Walt rushed to find his brother and when he did he saw just how horrific the war