Why were desertions so high among confederate and union troops?

Desertion was common on both sides. It became more frequent later in the war (when more of the soldiers were draftees rather than volunteers, and when the brutal realities of Civil War combat had become more clear), and was more common among Confederate soldiers, especially as they received desperate letters from wives and families urging them to return home as Union armies penetrated further south.

While it is impossible to know with certainty how many soldiers deserted over the course of the conflict, Northern generals reckoned during the war that at least one soldier in five was absent from his regiment; at war’s end, the Union Provost Marshal General estimated that nearly a quarter of a million men had been absent from their units sometime during the war. Estimates for Confederate armies range even higher—perhaps as many as one soldier in three deserted during the course of the war. The Army of Northern Virginia alone lost eight percent of its total strength in a single month during the savage campaign of the summer of 1864.

Officially, desertion constituted a capital offense and was punishable by death.

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