Maréchal de camp Karl Joseph Anton Leodegar von Bachmann (3 March 1734 – 3 September 1792) was a French Royal Army officer best known for commanding the Swiss Guards during the insurrection of 10 August 1792, where he was killed.

[1] Bachmann was in direct charge of the 900 Swiss Guards present during the Insurrection of 10 August 1792, when French revolutionaries stormed the Tuileries Palace.

The nominal commander of the Guard, the elderly Colonel Louis-Auguste-Augustin d'Affry, was in poor health and had delegated Bachmann to bring the regiment into central Paris during the evening of 9 August.

[2] Having deployed his Swiss to defend the palace Major Bachmann escorted King Louis XVI and the Royal Family to the National Assembly, where they sought refuge.

[4] Arrested by the revolutionaries, Major Bachmann was accused of treason for ordering the Swiss Guard to resist the storming of the royal palace and thereby offending the "Majesty of the People".