He moved to Paris, where he joined the First International and participated in the events of 4 September 1870 when the Government of National Defense was proclaimed.

The next day he led a dozen friends to Paris, where he joined the Commune, fought at Fort d'Issy and was made an officer.

[4] When strikes broke out in Vierzon, particularly at the Société française de matériel agricole, Baudin strongly supported the workers.

Three months later he was reelected to the General Council for La Guerch in the first round, with his expenses covered by subscriptions from twenty deputies and from his friend.

[3] He was again physically expelled from the council, and was finally obliged to capitulate and refrain from running in new elections due to lack of money.

[3] He was one of two successes for the Marxists claimed by Paul Lafargue, the other being Christophe Thivrier, an ex-miner and municipal councillor for Commentry who had campaigned as a Boulangist and joined the Workers' Party after being elected.

[6] However, Friedrich Engels saw the elections as a success, counting Baudin, Thivrier and Félix Lachize as Marxists, and considering that Gustave Paul Cluseret and Ernest Ferroul were "bound to cast in their lot with the first three.

He questioned the Minister of the Interior, Constans, about the brutal action of the police on 7 June 1891 against an authorized socialist demonstration.

The demonstrators were laying a wreath in the square near Sacré-Cœur, Paris, where Eugène Varlin, a former member of the Commune, had been shot.

[3] Victorien Sardou's play Thermidor, first staged at the Comedie-Francaise on 24 January 1891, portrayed the revolution from a conservative viewpoint.

[11] In December 1891 the newly-elected socialist deputy Paul Lafargue spoke against the campaign for separation of church and state.

[12] When the workers at the Rosières ironworks in Lunery, Cher, went on strike in May 1892 for higher pay and better conditions they immediately telegraphed Baudin and asked him to come and guide the movement.

[14] Jean Jaurès, Duc-Quercy and Eugène Baudin said the strike was an attempt to guarantee the political liberties of Carmaux voters.

[15] In the 18 October 1894 session Baudin and Millerand accused Baron René Reille of deliberately prolonging the strike to punish the strikers.

[16] On 1 May 1893, when the government ordered closure of the Labor Exchange (Bourse du Travail), Baudin took part in the protest demonstration.

[3] Jean Jaurès sided with Baudin, showed the police account was false and asked the government to respect the rights of the socialist opposition.

[17] In the 20 August 1893 legislative elections Baudin again ran on the Worker's Party platform, calling for revision of the monarchical constitution of 1875, suppression of the budget for religion, return of church property to the nation, election of magistrates, statutory limits to working hours, a minimum wage, a pension fund for the elderly and an agricultural credit organization.

[3] He had been sponsored by Édouard Vaillant's Central Revolutionary Committee (CRC), which became a constituent element of the Socialist Union.

He remained a member of the Socialist Revolutionary Party, and contributed to the journal La démocratie de l'Ouest.

There he opened a ceramic workshop where he made "soft sandstones, fired on iridescent porcelain, with metallic reflections."