Rubuta ci gaba don wannan sakin layi - An haife shi a Erandio, Biscay, Rubial ya kasance mai aikin ƙarfe. Ya shiga kungiyar Unión General de Trabajadores (UGT) a shekarar 1920 da kuma Jam'iyyar Socialist Workers ta Spain (PSOE) a shekarar 1922. A cikin 1934, an kama shi saboda ayyukan juyin juya hali a lokacin yajin aikin ma'adinai na Asturian na 1934
, wanda aka tsare shi na tsawon watanni bakwai a kan jirgin fursuna. Daga nan aka yanke masa hukuncin shekaru bakwai a gidan yari saboda tayar da zaune tsaye, amma an ba shi afuwa bayan nasarar Popular Front a babban zaben Spain na 1936.