Tuhia he tohutoro mō tēnei wāhanga - I te tau 1936, i te tīmatanga o te Pakanga ā-Iwi o Pāniora, i uru ia ki te Fifth Regiment. I te tau e whai ake nei, hei rangatira nui o te ope taua, e whakahau ana i te wehenga 11 o te ope o te motu, he mea nui a Líster ki te tiaki i Madrid
me ētahi atu mahi hōia nui. I te Oketopa 1936 i arahi ia i tetahi pirihimana whakauru i roto i te whakaeke kino a te Republican i Seseña. Hei rangatira wehenga, i awhina ia ki te aukati i te whakaeke Nationalist i te taha o te Jarama me te whai waahi nui ki roto i te whakaeke angitu a te Republican i te Pakanga o Guadalajara.