How can the poem "War Is Kind" reflect universal themes in Civil War literature?

Over 600,000 American lives were lost in the Civil War, leaving countless families forever altered, to say nothing of the misery caused by the physical, emotional, and economic harm inherent in this four-year-long series of battles.
Stephen Crane's poem reflects universal themes found in Civil War literature; among them is a dark tone that questions the veracity of claiming that any war contains "glory" or that any man "was born to drill and die." The poem calls upon a young maiden who loses her lover, a woman who loses her son, and a baby who loses her father not to weep, a preposterous suggestion that anyone who has lost a loved one to battle would likely find offensive and unrealistic. The poem's situation suggests that even though the completion of the war reunified the opposing sides into a single nation and slavery came to its end, the costs were incalculable to the survivors.