Upon the withdrawal from the front of Richmond, the III Corps accompanied the Army of the Potomac to Manassas, where it was sent to reinforce John Pope's Army of Virginia. The corps left Harrison's Bar on August 14, and, marching to Yorktown, embarked on August 20 for Alexandria. It arrived at Warrenton Junction on August 26, and on the following day the Excelsior Brigade had a sharp fight at Bristoe Station. On August 29, the corps was engaged at Groveton. Cuvier Grover's Brigade, of Hooker's Division, fought desperately at the railroad embankment, in which the use of bayonets and clubbed muskets was officially reported. On the September 1, Kearny's Division was engaged at Chantilly, Birney's Brigade taking a prominent part; Kearny was killed in this action. The losses of the corps at Manassas, including Bristoe, Groveton, and Chantilly, amounted to 260 killed, 1,525 wounded, and 453 missing; total, 2,238, including Phil Kearny, who was shot dead by Confederate troops at Chantilly. Hooker's Division numbered fully 10,000 men at Yorktown, and received a reinforcement of about 3,000 more; after Manassas, it drew rations at Fairfax Station for only 2,400 men.