On 25 November 1905, at the age of 15, he threw, from the Haberdasher's where he was employed, a bucket of wet sawdust to a group of Spanish soldiers returning from attacking and breaking the headquarters of the ¡Cu-Cut!
[4][5] He worked with and became a close friend of the Catalan poet Joan Salvat-Papasseit, who authored the prologue of Cardona's first book, "La batalla", published in 1923.
[6] Exiled to France during the dictatorship of Miguel Primo de Rivera, he was among the plotters of the 1924 "acció del Garraf", a failed attempt of regicide on Alfonso XIII.
[11][12] He also won the elections of January 1934 this time with a list named National Front against the Republican Left of Catalonia.
[5][12] In the context of the Spanish Civil War, he was interrogated and threatened by the anarchists in Aragon after being accused of helping priests hidden in the town of Maella to escape to France.
[5] After the May Days of 1937, when the Catalan police became controlled by the Spanish Republic government he moved again to Perpignan in Northern Catalonia.
The National Front of Catalonia collaborated with the French Resistance, the British Secret Service and the Polish secret services in the context of World War II and represented the main opposition group to the occupation of Catalonia by Fascist Spain in the early period between 1939 and 1947.
Madrona lost another son when Spanish militars under the orders of the brutal general Severiano Martínez Anido, Barcelona head of police Miguel Arlegui Bayonés and a military magistrate attacked their home looking for Daniel Cardona who had escaped to his first exile (Cardona referred to this period as the dictatorship Anido-Arlegui[16] - see Pistolerismo and Sindicatos Libres for references to the period).
During his third and last exile in France, in a letter to his son Jordi in 1938, he mentions that the Department of Propaganda of the Generalitat de Catalunya would soon publish one book written by him.