of the Russian Empire. April 5 – French Revolution: Reign of Terror – Georges Danton is executed. April 17–19 – Kościuszko Uprising – Warsaw Uprising: The Polish people overthrow the Russian garrison in Warsaw. April 19 – Britain, Prussia and the Netherlands sign a treaty of alliance against France. April 28 – Sardinian Vespers: The people of Cagliari in Sardinia oust the viceroy and his Piedmontese functionaries. April 29–May 1 – Battle of Boulou: The French defeat the Spanish and Portuguese forces. May 7 – French Revolution: Robespierre establishes the Cult of the Supreme Being as the new state religion of the French First Republic. May 8 – French Revolution: Reign of Terror – Chemist Antoine Lavoisier is tried, convicted and executed by guillotine in Paris, on the same day as with 27 co-defendants also associated with the former ferme générale. May 18 – Battle of Tourcoing: French troops defeat British forces. May 28–June 1 – The Glorious First of June (Battle of Ushant): The British win a crushing tactical victory over the French fleet, but the merchant convoy escorted by the French fleet arrives safely in France. June 4– British troops capture Port-au-Prince in Haiti from the French. June 17 The Anglo-Corsican Kingdom is established. Battle of Mykonos: The British Royal Navy captures . June 24 – Bowdoin College is founded in Brunswick, Maine. June 26 – Battle of Fleurus: French forces defeat the Austrians and their allies, leading to permanent loss of the Austrian Netherlands and destruction of the Dutch Republic. French use of an observation balloon marks the first participation of an aircraft in battle. June–July – Mount Vesuvius erupts in Italy; the town of Torre del Greco is destroyed. July–September July 12 – Horatio Nelson loses the sight in his right eye, in the British Siege of Calvi in Corsica. July 13 – Battle of Trippstadt between French forces and those of Prussia and Austria (First Coalition). July 13–September 6 – Kościuszko Uprising: Siege of Warsaw – The Polish people resist a siege by armies of the Russian Empire and Kingdom of Prussia. July 17 – The sixteen Carmelite Martyrs of Compiègne are executed 10 days prior to the end of the French Revolution's Reign of Terror. July 27 (9 Thermidor) – French Revolution – Thermidorian Reaction: Maximilien, Augustin Robespierre and Saint-Just are arrested on the orders of the French National Convention; they are executed the