O Captain! My Captain!

O Captain! My Captain! is a poem by Walt Whitman, written in 1865 in response to the assassination of President Abraham Lincoln. It is part of Whitman's larger work, Leaves of Grass, and is regarded as one of his most significant poems. The piece reflects themes of mourning and loss, capturing the national grief following Lincoln's death. This poem has been widely celebrated and recited, making it a notable work in American literature.