Byington gained a reputation as a war correspondent when he became the first to deliver news of the outcomes of the battles of Bull Run and Gettysburg.
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After the Battle of Bull Run, the United States government took possession of several private hospitals in Washington, D.C., Alexandria, Virginia, and surrounding towns.
In 1879, when a Board of Review commissioned by President Rutherford B. Hayes issued its report recommending a pardon for Fitz John Porter, it attributed much of the loss of the Second Battle of Bull Run to McDowell.