the first attack before dawn on the morning of 7 september 1857 resulted in 7 dead and 16 wounded
no bows and arrows were used in the initial attack - only rifled weapons
the attack and final massacre took 5 days, not 5 minutes
PLEASE read this wiki on the baker-fancher party, which had to be created as a separate accounting of the factual, documented and cited history, distinct from the church-controlled primary page named "mountain meadows massacre"
https://en.wikipedia.org/wiki/Baker–Fancher_party
+++
During the early morning hours of Monday, September 7,[39] the Baker–Fancher party was attacked, at their Mountain Meadows camp, by as many or more than 200 fighters – Mormon militiamen disguised as Native Americans, and according to some accounts including Paiutes,[40] but this was refuted by some of the survivors.
The attackers were positioned in a small ravine southeast of the emigrant camp.[12]: 158 As the attackers shot into the camp, the Baker–Fancher party defended itself by encircling and lowering their wagons, along with digging shallow trenches and throwing dirt both below and into the wagons. Seven emigrants were killed during this opening attack and were buried somewhere within the wagon encirclement; sixteen more were wounded. The attack continued for five days, during which the besieged families had little or no access to fresh water and their ammunition was depleted.[41]
On Friday, September 11, 1857, two Mormon militiamen approached the Baker–Fancher party wagons with a white flag and were soon followed by Indian agent and militia officer John D. Lee. Lee told the battle-weary emigrants that he had negotiated a truce with the Paiutes, whereby they could be escorted safely the 36 miles back to Cedar City under Mormon protection in exchange for turning all of their livestock and supplies over to the Native Americans.[42] Accepting this, the emigrants were led out of their fortification. When a signal was given, the Mormon militiamen turned and murdered the male members of the Baker–Fancher party standing by their side. According to Mormon sources, the militia let a group of Paiute Indians execute the women and children. Some children were killed while in their mothers' arms or after being crushed by the butts of rifles or boot heels. The bodies of the dead were gathered and looted for valuables, and were then left in shallow graves or on the open ground. Members of the Mormon militia were sworn to secrecy. A plan was set to blame the massacre on the Indians. The militia did not kill 17 small children who were deemed too young to relate the story. These children were taken in by local Mormon families. The children were later reclaimed by the U.S. Army and returned to relatives, and there is legend that one girl was not returned and lived out her life among the Mormons.[43]