Baudrillart's maternal grandfather, Samuel Ustazade de Sacy, was redactor in chief of the Journal des débats and a member of the Académie française.

He founded the Comite catholique de propagande francaise a l'etranger and reached an audience of 15 million with articles written for publication in U.S.

[2] He received his episcopal consecration on the following 28 October in the Institut's Église des Carmes from Cardinal Louis-Ernest Dubois,[3] with Bishops Stanislas Touchet and Joseph-Marie Tissier serving as co-consecrators.

[11] Baudrillart supported the Vichy government of Marshal Philippe Pétain, issuing a statement titled Choisir, vouloir, obéir (Choose, desire, obey) on 20 November 1940, which shocked his colleagues and veterans of the First World War.

[12] In August 1941, as a fervent anti-communist, endorsed the formation of the creation of a Legion of French Volunteers Against Bolshevism to fight alongside the Germans.

[4] He was a member of the Legion's Honorary Committee of Sponsors, and his views, according to his diary, were influenced by meetings with Kurt Reichl [de], an Austrian Catholic, German officer, and Nazi counter-intelligence agent.

[12] His endorsement of the Legion said:[12] Priest and French, how can I, in a moment so decisive, refuse to approve the common noble enterprise directed by Germany, dedicated to liberate Russia from the bonds that have held it for the last twenty-five years, suffocating its old human and Christian traditions, to free France, Europe, and the world from the most pernicious and most sanguinary monster that mankind has ever known, to raise the peoples above their narrow interests, and to establish among them a holy fraternity revived from the time of the Christian Middle Ages?Baudrillart died in Paris on 19 May 1942 at the age of 83.