Captain, appreciation of my captain's poems

This is a poem written by Whitman in memory of Lincoln. If you want to know the benefits of this ending, I suggest you know the writing background first. 1783, after the United States became independent from British rule, wage labor and black slavery appeared in China. 10 In October, Lincoln, who was famous for opposing slavery, was elected President of the United States. Several southern States declared their independence from the federal government. 186 1 April, they sent troops to rebel for the first time, which triggered a civil war. Less than half a year after taking office, President Lincoln led the federal army. With the support of the broad masses of the people, after four years of fighting, he defeated the southern rebels, safeguarded the unity of the United States, and abolished black slavery. The Civil War was the second bourgeois-democratic revolution in American history. The success of this revolution promoted the development of American capitalism. President Lincoln wrote a glorious page for American history with his outstanding achievements. At the moment when the whole country celebrated the great victory, the southern slave owners who had a deep hatred for democracy sent spies to assassinate President Lincoln. After the death of President Lincoln, Whitman wrote the poem "Ah, Captain, My Captain" to express his grief and nostalgia for Lincoln. The use of "fallen, cold and dead" in the poem is repeated every once in a while, expressing the poet's feelings from shallow to deep and step by step. In the poem, the main sentence is "depravity, coldness and death", which some people call "separation". This technique makes this poem not only maintain the consistency and heaviness of expressing sadness, but also reflect the development process of this emotion.