Centred on characters from the rebellious city of Marseille, most of the great events of the Revolution from 1789 to 1792 occur offstage. In Marseille, citizens capture the royal fortress of Fort Saint-Jean and set up a revolutionary council. When war is declared against Austria in April 1792, the city raises a force of 500 volunteers who march to Paris. Entertained there to a banquet, a man from Alsace sings a patriotic ballad which moves the men from Marseille. Adopting it as their marching song, it is soon known as La Marseillaise. In July Prussia joins forces with Austria and the people, enraged by the threats in the Brunswick Manifesto, storm the Tuileries Palace, making prisoners of the King and Queen. A volunteer army then marches east to face the highly professional Prussian forces and in September, to the astonishment of the world, beats them at Valmy.