defected
dɪˈfɛkt
verb
abandon one’s country or cause in favour of an opposing one.
he defected to the Soviet Union after the war
desert,go over to the enemy,turn traitor,rebel,renege,abscond,go AWOL,quit,escape,shift ground,break faith,be apostate,apostatize,abandon,renounce,repudiate,secede from,revolt against,rat on,forsake,tergiversate