The historiography of Frederick, Maryland has maintained in the years since the Civil War that the area was firmly pro-Union. However, through the 1860 presidential election, as well as the reactions of residents of Frederick to the Confederate Army through 1862, it becomes apparent that there was a significant, although perhaps not sizeable, group with Confederate sympathies. In 1863, Frederick County began to shift its sympathies. Through the narrative written by one diarist about the Confederate Army’s march through Maryland prior to the Gettysburg Campaign, the army’s residence in Frederick during the Battle of Monocacy, as well as the 1864 Presidential Election returns, there is evidence that the city and county became more pro-Union as the war went on. Frederick County, as well as the city of Frederick, was divided in its sympathies at the beginning of the Civil War. By 1863, the county began to favor the Unionist sentiment for which it is known and has been remembered.
McNish, Megan E.
""Spare your country's flag": Unionist Sentiment in Frederick, Maryland 1860-1865,"
The Gettysburg College Journal of the Civil War Era: Vol. 6
, Article 7.
Available at: https://cupola.gettysburg.edu/gcjcwe/vol6/iss1/7