Assigned to Samuel Bell Maxey's Ninth Texas Infantry, Young and his command fought at the battle of Shiloh, on April 6 and 7, 1862, after which he was promoted to the command of the regiment. Young led the Ninth Texas in the battles of Perryville, Kentucky (October 8, 1862); Murfreesboro, Tennessee (December 31, 1862-January 3, 1863), where he was wounded in the shoulder and had two horses shot from under him; and in the Vicksburg campaign (spring and summer 1863), in which he sustained a second wound, this to the thigh, at the battle of Jackson, Mississippi, on May 14, 1863. There, according to the official report, Young "seized the colors of his regiment in one of its most gallant charges and led it through." More modestly, Young reported of the same engagement, he "ordered the regiment to move forward with a shout, both of which they did, a la Texas."
At Chickamauga (September 19 and 20, 1863) he was wounded a third time, in the chest. Transferred with his regiment to Gen. Matthew D. Ector's brigade, he participated in the Atlanta campaign (spring and summer 1864) and despite suffering wounds to the neck and jaw at the battle of Kennesaw Mountain on June 27 was promoted to brigadier general to rank from August 15, 1864, when Ector was disabled at the battle of Peachtree Creek. Young's brigade consisted of his own Ninth Texas Infantry plus the Twenty-third Texas Cavalry (dismounted) and the Twenty-ninth and Thirty-ninth North Carolina Infantry regiments. During John Bell Hood's disastrous Tennessee campaign (October-December 1864), during which Young's regiment was attached to the brigade of Gen. Samuel G. French, Young lost his left foot to enemy fire, had his horse shot from beneath him, and was captured at Altoona, Georgia, on October 5. "Most gallantly," reported French, "he bore his part in the action."
Held prisoner at Johnson's Island, Ohio, Young was not released until July 24, 1865. Following the war Young moved to San Antonio, where he was a successful attorney and real estate investor. Later he and his father organized a transportation company that hauled freight between San Antonio and Monterrey, Mexico. Young also organized the Nueces River Irrigation Company and acquired considerable ranch and farm property. For a time he was owner of the San Antonio Express. General Young died in San Antonio on November 28, 1901, and is buried in the Confederate Cemetery there.
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