Bassal was named with Jacques Garnier de Saintes on the first mission in the Jura, the Ain, the Côte d'Or and Doubs by decree of 18 June 1793, to quell unrest and purify the authorities.

Once Bassal and his colleague Garnier arrived in Benscaon, they influenced one of the clubs to declare itself aligned with the Parisian Jacobins, "for the Mountain," as the saying went, and acquired the mantle of power.

Then he was sent with Charles-Jean-Marie Alquier, Bernard de Saintes and Jacques Reverchon, mission Ain, Jura, Côte d'Or, the Mont-Terrible and Haute-Saône by decree of 17 August 1793, to quell the royalist uprisings there and to secure the borders with Switzerland and German states.

Appointed at the beginning of Directory as a secret agent in Basel, his mission was to ensure supplies of the army of Italy and monitor those suspected of not having denounced the counter revolution in Switzerland and remained in regular correspondence with one of the leaders (known as the Master, probably William Wickham) of the royalist insurrection of 13 Vendemiaire Year IV.

These measures were part of broader efforts taken to secure the revolution in the Kingdom of Naples along the republican lines established in France, which included guaranteeing the national debt.