kabul u.s. service member kill eastern afghanistan saturday military say without give detail identity circumstances death occur american force step operations taliban statement u.s. force afghanistan command kabul say service member die wound sustain operations logar eastern province another service member kill last week helicopter crash despite tragic event remain steadfast commitment afghan people support mutual fight terrorism gen. john nicholson top u.s. commander afghanistan say statement late death come president donald trump order boost number u.s. troop assist afghan force taliban part new strategy try break stalemate insurgents although u.s. troop combat new strategy give great authority engage taliban involve act advisers brigade battalion level bring much close front line aug 23 10 u.s. service members kill afghanistan year accord figure publish last week congressional watchdog sigar double number kill periods 2015 2016. separately u.s. military say investigate report civilian casualties cause combine operation northern city kunduz friday assess facts surround incident u.s. service member kill afghanistan u.s. military