She also performed during and after WWII in support of Allied Forces. From the personal memoire of Lt. Gen. John C. H. Lee, on 24 July 1945: "After an early dinner drove in convoy to the Paris Opera House for the gala performance entitled "Pacifique 45" given by the French for the benefit of the families of French war veterans. The program laid particular emphasis on the war in Japan and included the showing of two films - "Fighting Lady" and "Iwo Jima" and the rendition of several songs and the French and American national anthems by Grace Moore. Seated in the box of honor were General Alphonse Juin, the French Minister of Information Jacques Soustelle, and a number of important American and French officers. It seemed to be a great success and was particularly appreciated by the crowd of some 20,000 gathered in the square outside the Opera House."