Complex sentence: In August, 1861, following the outbreak of the American Civil War, Mahler assisted Philadelphia liquor merchant Henry Bohlen to recruit and organize a regiment, which would be eventually be designated the 75th Pennsylvania Infantry.
Split into simpler sentences: In August, 1861, following the outbreak of the American Civil War, Mahler assisted Philadelphia liquor merchant Henry Bohlen to recruit and organize a regiment. This unit would be eventually be designated the 75th Pennsylvania Infantry.