On May 14, Battery E supported Sherman's final attack on Jackson. Advancing during a driving rainstorm across Lynch Creek, a rain-swollen stream that ran only two miles from the Mississippi State Capitol, the XV Corps quickly ran into the Third Kentucky Mounted Infantry, the First Georgia Sharpshooter Battalion and Captain Martin's Georgia Battery. The Federal advance was temporarily halted before Battery E and a companion battery from the 2nd Iowa responded in kind. One Iowa soldier briefly described Battery E's role in this battle in these terms: