In August 1793, Dubois-Crancé was designated representative on mission to the army of the Alps, to direct the siege of Lyon, which had revolted against France's government. Accused of "lack of zeal", he was replaced by Georges Couthon. On his return he defended himself, but was excluded from the Jacobin Club at the instance of his rival Robespierre on 11 July 1794. Consequently, he was approached to take part in the Thermidor Coup that toppled Robespierre at the end of the month. However, he would not join the Royalist reaction which followed, and was one of the Committee of Five which had to oppose the Royalist insurrection known as "13 Vendémiaire" (in October 1795).