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The 20th Arkansas infantry was originally organized as the 22nd Arkansas Infantry at DeValls Bluff, Arkansas, on April 9, 1862:
Company B – the "McCulloch Avengers" – Commanded by Captain Henry Poston Johnson, organized in Hempstead County, Arkansas, on March 1, 1862.
The footnote for this info came from http://www.couchgenweb.com/civilwar/20infhis.html
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