▁in ▁the ▁United ▁States ▁when ▁it ▁re - open ed ▁in ▁ 1 9 4 4 ▁following ▁the ▁liber ation ▁of ▁France . ▁▁ ▁After ▁the ▁war , ▁he ▁served ▁in ▁a ▁variety ▁of ▁diplom atic ▁posts , ▁primarily ▁in ▁North ▁Africa , ▁Asia , ▁and ▁the ▁Lev ant . ▁He ▁and ▁his ▁cousin , ▁X avier ▁de ▁Be a ul ain court - Mar les , ▁who ▁had ▁served ▁as ▁Charles ▁de ▁Ga ulle ' s ▁private ▁secretary ▁since ▁ 1 9 4 8 , ▁were ▁part ▁of ▁de ▁Ga ulle ' s ▁close ▁ent ou rage ▁during ▁the ▁period ▁of ▁the ▁so - called ▁politics ▁of ▁grande ur ▁( 1 9 6 0 - 1 9 6 8 ). ▁Many ▁of ▁them , ▁including ▁de ▁La ▁Che val erie , ▁later ▁served ▁on ▁the ▁administrative ▁council ▁of ▁the ▁. ▁▁ ▁From ▁ 1 9 6 1 ▁to ▁ 1 9 6 2 , ▁de ▁La ▁Che val erie ▁served ▁as ▁Chief ▁of ▁Staff ▁to ▁the ▁French ▁Minister ▁of ▁Foreign ▁Affairs , ▁and ▁then ▁held ▁a ▁similar ▁post ▁at ▁the ▁ ▁( Min istry ▁of ▁International ▁Co operation ). ▁▁ ▁In ▁ 1 9 6 7 , ▁he ▁was ▁named ▁Chief ▁of ▁Staff ▁to ▁President ▁de ▁Ga ulle ▁and ▁served ▁in ▁that ▁post ▁until ▁ 1 9 6 9 ▁when ▁de ▁Ga ulle ▁res igned ▁from ▁office . ▁▁ ▁Short ly ▁after ▁de ▁Ga ulle ' s ▁res ignation ▁in ▁ 1 9 6 9 , ▁de ▁La ▁Che val erie ▁was