Rubuta ci gaba don wannan sakin layi - A farkon yakin basasar Spain an daure shi a Ibiza kuma an sake shi a watan Agusta 1936 lokacin da tsibirin ya koma ikon Jamhuriyar. A watan Nuwamba na 1936 ya kasance a Madrid bayan ya yi umurni da fadar masarauta (Palacio de Zabálburu) kusa da Retiro Park a matsayin hedkwatar Alianza de Intelectuales Anti-fascistas (Alliance of Anti-Fascist Intellectuals), wanda ya zama gida na biyu ga Gerda Taro. A lokacin yakin basasa na Spain, Alberti ya zama muryar mawaƙa na hagu kuma ya yi watsa shirye-shirye akai-akai daga babban birnin a lokacin Siege na Madrid
sojojin Francoist, suna hada wakoki don yabon masu kare birnin. Da kyar aka samu wani bugu na jaridar XV International Brigade, "Volunteer for Liberty" wanda ba ya dauke da daya daga cikin wakokinsa. A farkon 1939 shi da matarsa suna cikin Elda suna gudanar da babban gidan ƙasa a matsayin otal, inda 'yan Republican da yawa suka taru don yin la'akari da gudun hijira. Waɗannan sun haɗa da La Pasionara, Enrique Líster da Juan Modesto. Bayan shan kashi na Mutanen Espanya Republican Armed Forces da kuma rushewar Jamhuriyar ta bangaren 'yan tawaye, Alberti da María sun gudu zuwa Paris ta hanyar Oran kuma suka koma wani gida tare da Pablo Neruda a Quai de l'Horloge. Sun zauna a Paris har zuwa ƙarshen 1940 suna aiki a matsayin masu fassara don rediyon Faransa kuma a matsayin masu sanarwa don watsa shirye-shiryen "Paris-Mondial" a Latin-America. Bayan mamayar Jamus ta Faransa sun tashi daga Marseilles zuwa Buenos Aires a kan SS Mendoza.