Various accounts locate Etheridge at notable battles, such as the 1st Bull Run, Williamsburg, 2nd Bull Run, Antietam, Fredericksburg, and Gettysburg. Etheridge was in every battle of the Army of the Potomac except the Battle of South Mountain. At the Battle of Chancellorsville on the morning of May 3, 1863, Etheridge rode up to a general and his staff with a sack of hardtack and a dozen canteens filled with hot coffee. The men tried to get her to leave but she insisted on remaining until each of the officers ate and drank. During the time she waited, three horses were hit by Confederate solid shot. Yet, as a nearby soldier wrote, "she never flinched or betrayed the slightest emotion of fear". Later, she appeared at a Union artillery battery that had taken serious casualties in men, horses, and equipment. The artillerists were considering leaving the guns, but she talked them out of it, offering the soldiers encouragement. The gunners cheered, insisted that she leave, and returned to their duties. One soldier noted "that brave little sergeant in petticoats" bucked up their morale more than any officer could have done.