about–face 
/əˈbaʊtˈfeɪs/ noun
plural about–fac·es /əˈbaʊtˈfeɪs/ noun [count] 1 : the act of turning to face in the opposite direction
▪ The soldiers were ordered to do an about-face. 2 : a complete change of attitude or opinion — usually singular ▪ After saying that he didn't want the job, he did an about-face and accepted the offer.
▪ The soldiers were ordered to do an about-face.
