Marie Antoinette gets one at her supposed trial, when she had been accused of incest with her son. She first didn't reply to the charge, but when the court demanded an answer she refuted the charge with the words "If I have not replied it is because Nature itself refuses to respond to such a charge laid against a mother", getting the support of the watching women (many of which had previously tried to lynch her) and Robespierre and Saint-Just themselves. Note that Saint-Just was the one who wanted her and Louis XVI dead the most, and was personally responsible for both swaying the courts into sentencing the deposed king to death and organizing her own sham trial.
In fact she did such a good job that she got the friggin' Légion d'honneur for it.
Early on, with Louis XV on his deathbed but still alive, the king's confessor got one by kicking Madame Du Barry out of Versailles. This is the same Madame Du Barry who, thanks to her influence over Louis XV, succeeded in forcing Marie Antoniette (the Dauphine of France, and thus both the future queen and the most powerful woman of France) to surrender and aknowledge her right to stay at court, and the king's confessor (a minor son of a noble line) not only got her exiled from Versailles and the court but got the king to give the order himself.
In the lead-up to the Revolution, Oscar's mutinous French Guards gets two in the same day. First, without officers (who, apart Oscar, stayed loyal to the Crown), they saves the rebelling Parisians from two royalist regiments (including the elite Royal-Allémand dragoons) in a Curb-Stomp Battle, finally proving that at least one of the oversized Household Regiments is the Badass Army it's supposed to be. Then the massed Oh Crap! at court when they find out of the mutiny (even before they find out Oscar led them), because they knew that, with the premier regiment of the kingdom on the rebellion's side, suppressing the revolt of Paris was next to impossible.
The following day, July 14, the French Guards had another. The Parisians were on the losing side of a Curb-Stomp Battle in the storming of the Bastille due the Bastille defenders having guns and knowing how to use them while the Parisians had no idea how to use theirs, when the French Guard pulls another Big Damn Heroes by showing up and applying their military training to man the guns, forcing the Bastille into surrender. And this time it's not just Oscar's grenatiers to help the rebellion, but the entire rank and file of the regiment, the ones who had stayed loyal having deserted that very morning when ordered to suppress the rebellion of Paris.
The scene is a CMOA for some of the defenders too: when the cannons started firing most of the garrison went to the commander and begged him to surrender, but the soldiers detached from the Swiss regiment Salis-Samade calmly coordinated together, aimed at Oscar, shot a salvo, reloaded and salvoed again for good measure, keeping their cool in spite of knowing that their medieval fortress would soon shatter under the artillery fire.
With the sequel Eroica retroactively becomes one for Oscar too. Why? Because, before he became famous for repeatly mopping the floor with Austrian troops in his first Campaign of Italy, most people in the series failed to see past his insignificant looks until they saw him in action or he whipped out a terrifyingDeath Glare, but Oscar realized right away what Napoleon was capable of doing, something that only Joseph Fouché (theInformation Broker of the regime and in cahoots with Barras, who had already seen Napoleon in action at the siege of Toulon) and Desiree Clary (Napoleon's fiancee at the time) could do. Not even Alain (someone of undeniable smarts and experience in people more dangerous than they look) or Bernard (The Smart Guy and Intrepid Reporter of Rose Of Versailles).
In the anime, Rosalie was this close to killing Polignac, the one who murdered her mother. If memory serves, Rosalie steals some guns from Oscar's house at night, then, at gun point, threatens the men who were in charge of the carriage that Polignac and Charlotte were in. Once they're in a secluded forest, Polignac realizes that it's Rosalie, who quickly tells her to shut up and not talk to her, a pistol ready and aimed to shoot Polignac. Polignac runs away, screaming that she doesn't want to die, although it was Rosalie's personality that saved her.
Another one from both the anime and manga: Rosalie attends a ball with Oscar, and is quickly surrounded by women who wanted to know more about Oscar. Charlotte interrupts them and warns Rosalie not to be easily led. A minuet comes up and asks Rosalie if she knows it. Rosalie says that she doesn't, then proceeds to bully Rosalie about it. One of the ladies asks Rosalie about her mother, however Rosalie responds with "Maman". Charlotte hears this and notes that only poor people call their mothers "Maman". The young girl quickly deduces that Rosalie is a country bumpkin, then threatens to tell her mother (Polignac) that Oscar brought a poor girl to a ball. Enraged and insulted, what does Rosalie do? She throws her fan against Charlotte's face, of course. Rosalie then proclaims that she really is a noble's daughter, then proceeds to run away in tears.
When Polignac and Rosalie meet at court, the first thing that Rosalie does is take out a dagger from the folds of her dress to kill Polignac. Luckily, Oscar stops Rosalie from doing the deed because of the large number of witnesses, as well as killing a nobleman would result in the death penalty.