The final showdown was precipitated by Jean-Paul Marat's trial and the arrest of sectional activists. On 25 May the Paris Commune marched to the Convention to demand the release of these activists. In reply, Maximin Isnard, who was presiding over the Convention, launched into a diatribe reminiscent of the Brunswick Manifesto: "If any attack made on the persons of the representatives of the nation, then I declare to you in the name of the whole country that Paris would be destroyed". On the next day the Jacobins declared themselves in a state of insurrection. On 28 May the "Cité" section called the other sections to a meeting in order to organize the insurrection. On 29 May the delegates representing 33 of the sections formed an insurrectionary committee of nine members. On 2 June, 80,000 armed "sans-culottes" surrounded the Convention. After an attempt of deputies to leave was stopped with guns, the deputies resigned themselves to declare the arrest of 29 leading Girondins. In this way the Gironde ceased to be a political force.