iveness , ▁and ▁became ▁more ▁select ive ▁in ▁the ▁areas ▁they ▁pat rolled . ▁In ▁all , ▁April , ▁May ▁and ▁early ▁June ▁represented ▁the ▁blood iest ▁months ▁of ▁fighting ▁since ▁the ▁end ▁of ▁host ilities . ▁The ▁Ira qi ▁troops ▁who ▁were ▁left ▁in ▁charge ▁of ▁Fall uj ah ▁after ▁the ▁tr uce ▁began ▁to ▁dis per se ▁and ▁the ▁city ▁fell ▁back ▁under ▁ins urg ent ▁control . ▁ ▁In ▁the ▁April ▁battle ▁for ▁Fall uj ah , ▁U . S . ▁troops ▁killed ▁about ▁ 2 0 0 ▁resistance ▁f igh ters , ▁while ▁ 4 0 ▁Americans ▁died ▁and ▁hundreds ▁were ▁wounded ▁in ▁a ▁fier ce ▁battle . ▁U . S . ▁forces ▁then ▁turned ▁their ▁attention ▁to ▁the ▁al ▁Mah di ▁Army ▁in ▁Naj af . ▁ ▁A ▁large ▁con voy ▁of ▁US ▁Army ▁supply ▁tr uck s ▁man ned ▁by ▁civil ian ▁contract ors ▁was ▁amb ushed ▁and ▁suffered ▁significant ▁damage ▁and ▁cas ual ties . ▁ ▁Transfer ▁of ▁so vere ig nt y ▁In ▁June ▁ 2 0 0 4 , ▁under ▁the ▁aus p ices ▁of ▁United ▁Nations ▁Security ▁Council ▁Resol ution ▁ 1 5 4 6 ▁the ▁Co al ition ▁transferred ▁limited ▁so vere ig nt y ▁to ▁a ▁care t aker ▁government , ▁whose ▁first ▁act ▁was ▁to ▁begin ▁the ▁trial ▁of ▁S add am ▁Hus sein . ▁The ▁government ▁began ▁the ▁process ▁of ▁moving ▁towards ▁elections , ▁though ▁the ▁ins ur gency , ▁and ▁the ▁lack ▁of ▁coh es ion ▁within ▁the