Curtis moved his headquarters south to Rolla, Missouri, to solidify Union control in Arkansas. In March 1862, his army won the Battle of Pea Ridge in northwest Arkansas. His success made him pensive rather than triumphant. A few days after the battle he wrote, "The scene is silent and sad. The vulture and the wolf now have the dominion and the dead friends and foes sleep in the same lonely graves." He was promoted to major general for his success, effective March 21, 1862. On the same day in late March that he heard about his promotion, he also found out that his twenty-year-old daughter Sadie died of typhoid fever in St. Louis.