On July 1, 1832, beside Storrs Lake east of Milton, Brigadier General Henry Atkinson and 4,500 soldiers camped overnight while pursuing Black Hawk, the Sac Indian chief, who was fleeing northward up the east side of Rock River with 400 warriors and 1200 women and children. In a diary entry of that day, Lieutenant Albert Sidney Johnston wrote that after marching 23 miles from Turtle Village, the army camped by a small lake whose water was very bad, and that Atkinson had breastworks thrown up that night in the thick timber; the next morning, July 2, the army moved almost directly north toward Lake Coshkonong. Among Captain Early's mounted scouts was 23-year-old Abraham Lincoln, finishing his third 30-day enlistment. Atkinson's Army of the Frontier had entered Wisconsin at Turtle Village, now Beloit, where it camped on June 30, then moved north through the Prairie Road area to the lake. On July 2, the army camped again on Otter Creek about two miles east of Lake Koshkonong before entering Jefferson county. At Cold Spring on July 10, Lincoln was mustered out, his horse was stolen, and he returned by foot and canoe to New Salem, Illinois.