After a short stay at Newport News the corps was ordered to reinforce Maj. Gen. John Pope's Army of Virginia, and at Second Bull Run it fought its first battle as the IX Corps. Only the two divisions of Stevens and Reno were engaged in this action; they numbered 12 regiments and 2 batteries, fewer than 5,000 men. General Reno was in command of both divisions in Burnside's absence. The losses in this small engagement amounted to 204 killed, 1,000 wounded, and 319 missing; total, 1,523. Some of the regiments encountered a severe fire, the 28th Massachusetts losing 234 men. General Stevens was killed at Chantilly.