The following year, after the coup d'état of Primo de Rivera in Spain, he settled in Puigcerdà (capital of Cerdanya) as a delegate of the Confederación Nacional del Trabajo (CNT) to collaborate in the smuggling of weapons for the fight against the dictatorship.
He also avoided another lucrative activity: the clandestine passage of people across the border, an operation through which Estat Català and Esquerra Republicana de Catalunya received significant amounts of money.
[1] Another of Martín's objectives was to collectivize the livestock production of Cerdanya in Puigcerdà to supply the front, but he was faced with rejection of the measure by some farmers of Bellver, led by mayor and big land owner Joan Solé.
[1] Some sources accused him of having ordered numerous executions in Collada de Tosens, with more than fifty dead in that area.
[3] On April 27, 1937, Antonio Martín and Julio Fortuny, from Seu d'Urgell, and two other militants, were killed in an ambush in Bellver.