Which military conflict is most directly related to this passage? "oh, you who have hearts to feel; you who have kind friends around you, in sickness and in sorrow, think of the sufferings of the , destitute, and down-trodden slave. has sickness laid its withering hand upon you, or disappointment blasted your fairest earthly prospects, still, the outgushings of an affectionate heart are not denied you, and you may look forward with hope to a bright future. such a hope seldom animates the heart of the poor slave. he toils on, in his unrequited labor, looking only to the grave to find a quiet resting place, where he will be free from the oppressor."– austin steward,  twenty-two years a slave, and forty years a free man, 1861