After hearing news of the Union's success against Pickett's charge, Brigadier General Judson Kilpatrick launched a cavalry attack against the infantry positions of Longstreet's Corps southwest of Big Round Top. The terrain was difficult for a mounted attack because it was rough, heavily wooded, and contained huge boulders—and Longstreet's men were entrenched with artillery support.^[119] Brigadier General Elon J. Farnsworth protested against the futility of such a move, but obeyed orders. Farnsworth was killed in the fourth of five unsuccessful attacks, and his brigade suffered significant losses.^[120] Although Kilpatrick was described by at least one Union leader as "brave, enterprising, and energetic", incidents such as Farnsworth's charge earned him the nickname of "Kill Cavalry".^[121]