After his artistic studies at the Escuela Panamericana del Arte, Horacio Nestor Lalia made his professional debut in Hora Cero in 1964 and began a collaboration with the publishing house Columba in the following year. He assisted among others Eugenio Zoppi and Alberto Breccia on their work, and made appearances in El Tony and D'Artagnan. From 1966 to 1968 he worked for the British market, making several war stories for the Fleetway agency through the Solano Lopez studios. Between the late 1970s and late 1980s, he was present at the British market again with stories for 2000 AD. He also worked for publishers in Italy (Eura), Spain (Norma), Germany (Bastei) and France (Albin Michel).