▁and ▁Federal ▁forces ▁sent ▁to ▁Ut ah ▁in ▁the ▁late ▁ 1 8 5 0 s . ▁After ▁it ▁was ▁apparent ▁no ▁major ▁host ilities ▁would ▁break ▁out , ▁a ▁somewhat ▁more ▁conc ili atory ▁relationship ▁developed ▁between ▁Federal ▁troops ▁and ▁the ▁Leg ion . ▁ ▁In ▁ 1 8 5 7 ▁the ▁honor able ▁reputation ▁of ▁the ▁Ut ah - based ▁Nau vo o ▁Leg ion ▁took ▁a ▁blow ▁when ▁Nau vo o ▁Leg ion ▁members ▁in ▁Iron ▁County ▁participated ▁in ▁the ▁murder ▁of ▁ 1 2 0 ▁imm igr ants ▁moving ▁through ▁Ut ah ▁to ▁California . ▁This ▁event ▁is ▁known ▁as ▁the ▁Mountain ▁M ead ows ▁mass acre . ▁The ▁Ut ah - based ▁Nau vo o ▁Leg ion ▁participated ▁in ▁numerous ▁efforts ▁to ▁qu ell ▁problems ▁with ▁Indians , ▁and ▁also ▁did ▁certain ▁protect ive ▁duties ▁in ▁Ut ah ▁during ▁the ▁Civil ▁War . ▁ ▁As ▁non - M orm on ▁sett lers ▁and ▁U . S . ▁Government ▁officials ▁began ▁to ▁grow ▁in ▁numbers , ▁it ▁was ▁perce ived ▁that ▁the ▁Nau vo o ▁Leg ion ▁was ▁loyal ▁mainly ▁to ▁the ▁L DS ▁church ▁and ▁Br igh am ▁Young , ▁and ▁not ▁to ▁the ▁Ut ah ▁territorial ▁government . ▁This ▁per ception ▁was ▁more ▁ac ute ▁after ▁Br igh am ▁Young ▁was ▁removed ▁as ▁the ▁territorial ▁governor ▁and ▁a ▁non - M orm on ▁replaced ▁him . ▁The ▁Ut ah ▁milit ia ▁was ▁dis band ed ▁around ▁ 1 8 8 7 , ▁and ▁for ▁a ▁time ▁a