▁within ▁their ▁juris diction . ▁The ▁United ▁States ▁invol vement ▁within ▁the ▁tri als ▁had ▁difficulties ▁r anging ▁from ▁a ▁lack ▁of ▁international ▁policy ▁knowledge ▁and ▁being ▁under st aff ed , ▁which ▁led ▁to ▁pure ▁cha os . ▁Those ▁sent ▁to ▁investigate ▁the ▁war ▁cr imes ▁lack ed ▁proper ▁training ▁which ▁yield ed ▁reports ▁with ▁sub - par ▁information . ▁The ▁U . S . ▁encountered ▁count less ▁obst acles . ▁Ult imately ▁in ▁ 1 9 4 5 , ▁the ▁United ▁States ▁committed ▁to ▁two ▁distinct ▁war ▁cr imes ▁trial ▁programs , ▁one ▁under ▁American ▁military ▁juris diction ▁and ▁one ▁in ▁collaboration ▁with ▁the ▁Al lied ▁powers . ▁ ▁First ▁M auth aus en ▁Camp ▁Tri al ▁▁ ▁The ▁first ▁trial ▁of ▁personnel ▁from ▁M auth aus en - G us en ▁took ▁place ▁in ▁the ▁D ach au ▁concentration ▁camp ▁between ▁March ▁ 2 9 ▁and ▁May ▁ 1 3 , ▁ 1 9 4 6 . ▁Among ▁the ▁accused ▁were ▁ 6 0 ▁former ▁members ▁of ▁the ▁camp ' s ▁administration ▁and ▁August ▁E igr uber , ▁a ▁former ▁G au le iter ▁of ▁Upper ▁Austria . ▁Among ▁the ▁defend ants ▁were ▁also ▁Vik tor ▁Z ol ler ▁( former ▁commander ▁of ▁the ▁SS - T ot enk opf ▁guard ▁batt alion ), ▁and ▁do ctors ▁Friedrich ▁En tr ess ▁( an ▁SS ▁member ▁and ▁a ▁medic ▁who ▁pract iced ▁medical ▁experiments ▁on ▁hundreds ▁of ▁in m ates ; ▁killing ▁most ▁of ▁them ▁with ▁in jections ▁of ▁phen ol