[4] During 1910, he relocated to Galicia, where he attained political appointment to the jaimismo and was chosen as secretary of the Traditionalistic Xunta of Santiago de Compostela.

[9] Year 1917 was to be fundamental in the political path of Losada, as he became a member of the Irmandades da Fala and embraced Galicianism.

When Antón went back to Ourense he was responsible for receiving Francesc Cambó, and was responsible, together with Rodrigo Sanz and Lois Porteiro, for organizing the Galician autonomy candidatures in the province of Ourense before the Spanish general election held in 1918 (in coalition with the mauristas of José Calvo Sotelo).

[10] The electoral defeat provoked a general demoralization in the Irmandades and Losada concentrated his efforts in consolidating the group.

He accompanied Risco in the training of the Irmandade Nazonalista Galega during 1922, and was his Propaganda Minister for a year, failing in his attempts to reunify the Galicianist movement.

In reliance on Calvo Sotelo's promises, Losada collaborated initially with Primo de Rivera's dictatorship as a provincial deputy in Pontevedra.

During that period, Antón took part in the failed attempts to establish a Mancomunity of Galicia, leading to his capitulation at the beginning of 1925.

[4] During the rest of the dictatorship, he participated in cultural activities such as founding the Choral Polifónica of Pontevedra, the Eiriña Football Club and his work in the Seminario de Estudos Galegos, but without forgetting the aspirations for autonomy for Galicia.