The death of Joseph Smith caused a
succession crisis over who would lead the Church going forward.
Brigham Young began to take on the roles Joseph Smith previously had, and on August 31, 1844 he was elected as the Legion's "Lieutenant General". Previously, Young had been an assistant chaplain. Distributed flyers invited all armed men to participate in a “wolf hunt” in Warsaw on September 26 and 27.
Whistling and Whittling Brigade With the repeal of the Nauvoo Charter, the city was left without an official militia or police force. In response, in March 1845 Brigham Young organized the Bishops and Deacons to 1) "take care of the poor" and 2) guard the city at night, to keep everything straight.” While plans for an official arsenal had been discussed since at least June 10, 1843, it was not until September 16, 1844 that Lieutenant General Brigham Young dedicated a site near the temple “to the God of the armies of Israel” and broke ground. Prior to this point, the Nauvoo Masonic Hall had been used as a commissary and to store arms. Construction of the arsenal, in connection with construction of a gunsmith's shop and a powder magazine, continued despite the repeal of the Nauvoo Charter and the recall of state-issued arms. The arsenal was funded in part through non-attendance fines. Records in the Nauvoo Legion Arsenal Account book indicate that local merchants were sometimes paid to procure and ship arms and ammunition for the Legion.
Rising tensions Although no longer sanctioned, the Legion continued to function as though it still had authorization, including drills, parades, and new military appointments. Major General Rich stopped using his military rank and took on the title "President of the Organized Quorums of the Church of Jesus Christ of Latter-day Saints in Hancock County." At a September 9, 1845 meeting of the Anti-Mormon party, members were fired upon. In retaliation a group led by Levi Williams set fire to the Mormon settlements of Yelrome, Morley, and Lima and destroyed forty four homes. The morning of September 16, Lieutenant Frank Worrell of the nearby Carthage militia was shot and killed by
Orrin Porter Rockwell after refusing an order to stop by non-Mormon Sherriff William Backenstos. Worrell had been the sergeant of the guard at Carthage when the Smiths were assassinated. Backenstos and Rockwell went to Nauvoo and found Brigham Young, asking for assistance. Young offered 2,000 legionnaires to be commanded by Backenstos, who went through Hancock county burning "Gentile" property, and driving anti-Mormons from their homes, many of who fled across the border to Missouri and Iowa. Governor Ford wrote that "they sallied forth and ravaged the country, stealing and plundering whatever was convenient to carry or drive away." Governor Ford sent an army of 400 troops along with Judge Stephen A. Douglas to stop the violence on both sides. The army searched for bodies of two men believed to be murdered by Mormons, and after pressure from the Anti-Mormon party, arrested Sherriff Backenstos for the murder of Worrell (Rockwell went into hiding). ==Departure from Nauvoo==