▁transferred ▁to ▁U . S ▁Special ▁Forces ▁and ▁then ▁U g and an ▁elements ▁of ▁the ▁A U - R TF . ▁ ▁A U - R TF ▁operations ▁were ▁pl ag ued ▁with ▁difficulties ▁even ▁beyond ▁those ▁that ▁might ▁be ▁expected ▁of ▁a ▁multi - n ational ▁force ▁operating ▁in ▁remote ▁areas ▁across ▁several ▁countries . ▁During ▁March ▁ 2 0 1 3 , ▁Sele ka ▁reb els ▁over th rew ▁the ▁government ▁of ▁the ▁Central ▁African ▁Republic ▁( C AR ), ▁which ▁reduced ▁C AR ▁invol vement ▁and ▁made ▁operations ▁in ▁parts ▁of ▁that ▁country ▁difficult . ▁Then , ▁on ▁ 1 5 ▁December ▁ 2 0 1 3 , ▁fighting ▁broke ▁out ▁in ▁South ▁Sud an ▁between ▁the ▁central ▁government ▁and ▁forces ▁supporting ▁the ▁former ▁Vice - Pres ident , ▁R iek ▁Mach ar . ▁ ▁To ▁add ▁to ▁the ▁difficulties , ▁U g and an ▁forces ▁were ▁restricted ▁from ▁operating ▁in ▁the ▁D RC . ▁ ▁On ▁ 2 9 / 3 0 ▁June ▁ 2 0 1 4 , ▁U PDF ▁elements ▁of ▁the ▁A U - R TF ▁cl ashed ▁with ▁Sele ka ▁f igh ters ▁at ▁Z ako ▁and ▁K ono ▁villages , ▁in ▁the ▁Central ▁African ▁Republic ▁close ▁to ▁the ▁border ▁with ▁the ▁Democratic ▁Republic ▁of ▁the ▁Congo . ▁ ▁It ▁was ▁reported ▁that ▁ 1 2 ▁to ▁ 1 5 ▁reb els ▁were ▁killed ▁while ▁the ▁U PDF ▁lost ▁one ▁to ▁three ▁of ▁their ▁own ▁personnel . ▁ ▁During ▁January ▁ 2 0 1