In all, 50 Saint Patrick's Battalion members were officially executed by the U.S. Army. Collectively, this was the largest mass execution in United States history—the hanging of 38 Sioux at the conclusion of the Dakota War of 1862 appears to be the largest execution by hanging at a single event. En masse executions for treason took place at three separate locations on three separate dates; 16 were executed on 10 September 1847 at San Ángel, four were executed the following day at the village of Mixcoac on 11 September, and 30 were hanged at Chapultepec on 13 September. A sole was murdered by American soldiers when he was recognised among the prisoners of war in the aftermath of the Battle of Molino del Rey, by being thrown "into a mill flume and crushed by the wheel". At the San Ángel hangings all prisoners were executed without incident except for Patrick Dalton, who, as an American captain described, was "literally choked to death". Dalton had previously voiced concerns regarding his treatment. By order of Gen. Winfield Scott, thirty were to be executed at Chapultepec in full view of the two armies while they fought the Battle of Chapultepec, at the precise moment that the flag of the U.S. replaced the flag of Mexico atop the citadel. This order was carried out by Col. William Harney. Harney was taunted and jeered by the condemned men. While overseeing the hangings, Harney ordered Francis O'Connor hanged even though he had had both legs amputated the previous day. When the army surgeon informed the colonel that the absent soldier had lost both his legs in battle, Harney replied: "Bring the damned son of a bitch out! My order was to hang 30 and by God I'll do it!"