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In page Edgar Allan Poe:

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Poe's 1st Regiment of Artillery[4] was posted to Fort Moultrie in Charleston, South Carolina, before embarking on the brig Waltham on November 8, 1827. Poe was promoted to "artificer", an enlisted tradesman tasked with preparing shells for artillery. His monthly pay doubled.[5] Poe served for two years, attaining the rank of sergeant major for artillery, the highest rank that a non-commissioned officer could achieve. He then sought to end his five-year enlistment early.[citation needed]