The Filles de Saint Thomas Battalion (French: Bataillon des Filles-Saint-Thomas) is part of the National Guard of Paris, established on 13 July 1789.

François Robert, son-in-law of Louis Félix Guynement de Kéralio, noted that the epigraph of his newspaper, Le Mercure national, hardly changes from that of the flag of the district of Filles-Saint-Thomas: Live free or die.

"[1] Madame Agathe de Rambaud, who took care of the education of the future Louis XVII, recounting her memories from 1785 to 1792, to her family and those close to her, insisted on the differences in attitude of the battalions which in turn ensured the guard at the Tuileries Palace for more than two years.

However, if General Galiot Mandat de Grancey always guarantees on his head the good intentions of the king, because of the flight from Varennes and the revolutionary propaganda, he no longer succeeds in convincing all the National Guards.

After this dissolution, La Fayette is seen as a traitor in the eyes of certain revolutionaries, because he arrives in Paris, sworn to defend the king and uphold the Constitution.

[4] Three rows of grenadiers from the Filles de Saint Thomas Battalion lined up in front of the table and protect the royal family from the revolutionaries.

One met, in the streets, only frightening or wild figures, people who slipped along the houses in order not to be perceived, or who prowled seeking their prey..."On 20 July 1792, a rumor spread: "the deputies of the Left have been murdered by the aristocrats... 10,000 rifles are stored in the Tuileries."

On 30 July 1792, Duhamel, Lieutenant of the Filles de Saint Thomas Battalion, a stockbroker, was killed by Marseillais and other Guardsmen were more or less seriously injured.

Mathieu Dumas demanded that Duhamel's body be brought to the bar of the Assembly, but Charles Barbaroux would later say that the affair was "a plot intended to massacre the people of Marseilles".

To reinforce the National Guardsmen, Mandat calls upon sixteen battalions from 5 August 1792, but only a little more than two thousand men agree to participate in the defense of the Tuileries Palace.

Moreover, if the battalions of the Petits-Pères and the Filles-Saint-Thomas demonstrated their devotion to the royal cause on arrival, it was not the same for most of the others, in particular for that of the gunners of the Val-de-Grace who, commanded by Captain Langlade, seem ready at any moment to go over to the side of the insurgents.

Marie-Antoinette, in front of her apartments, harangues twenty grenadiers of the National Guard: "Gentlemen, all that you hold most dear, your wives and your children, depend on our existence, our interest is common."

and pointing to them nobles who are preparing to be attacked by the enemies in the apartments, she adds: "You must have no mistrust of these brave people who will share your dangers and will die until the last to defend their King."

The Filles de Saint Thomas Battalion is stationed near the flag of Marsan of the national grenadiers, on the first floor of the Grande Galerie in two rows, one facing the Seine and the other towards the court of the Princes.

Acloque, head of the second legion of the National Guard, hastens to warn the royal family, gathered in the king's chamber, of the imminence of danger.

To appease the crowd, Louis XVI agrees to show himself, and goes to the œil-de-bœuf room where he is surrounded by Acloque, several officers, the ministers Lajard and Chambonas, Madame Élisabeth and other people.

The sergeant of the gunners, Joly, is placed on the right of the king, a grenadier, Auguste, on his left, and the marshal de Mouchy sits in front.

[8] Most of the Swiss Guards, well supervised and accustomed to strict discipline, although the departure of the two companies which had accompanied the royal family to the Assembly had greatly reduced them, were still capable of resisting.

The National Guardsmen of the Filles de Saint Thomas Battalion who were not killed in the fighting attempted to flee, despite the revolutionaries searching for the defenders of the palace.

The future Marshal of the Empire, François Joseph Lefebvre, husband of Madame Sans-gêne, first sergeant of the French Guards on 9 April 1788, was not imprisoned, but he was not there.