[Festivities before troop train departs for the Aragon front, Barcelona, Spain]

[Solider sitting on curb, holding gun, eating, Aragon, Spain]

[Group of four people standing outside a bombed building, Aragon, Spain]

[Soldier of the Partido Obrero de Unificación Marxista (POUM) with partridge, Aragón, Spain]

[Two Republican soldiers sitting on side of car, reading papers, Aragon, Spain]

[Soldier of the Partido Obrero de Unificación Marxista (P.O.U.M.) with dove, Aragón, Spain]

[Battle of Rio Segre, Mora de Ebro, Aragón front, Spain]

[Soldiers in the trenches, Rio Segre, Aragón front, near Fraga, Spain]

[Woman washing laundry next to three Republican soldiers, Aragon, Spain]

[Two young boys sleeping next to their guns, Huesca, Aragon, Spain]

[Republican militiaman and militiawoman embracing before the departure of a troop train for the Aragón front, Barcelona]

[Man wearing an open striped shirt and head wrap, Huesca, Aragon, Spain]

[Manuel Grossi Mier of the POUM speaking from a balcony, Aragon, Spain]

[Manuel Grossi Mier of the POUM speaking from a balcony, Aragon, Spain]

[Republican soldiers aiming rifles over a barricade, near Huesca, Aragón front, Spain]

[Agricultural workers raising their fists in front of a corn mill, Aragón front, Spain]

[Man standing in front of farming equipment that has been seized by the government, Aragon front, Spain]

[Republican soldier carrying wounded comrade on his back, Rio Segre, Aragón front, near Fraga, Spain]

[Soldiers walking on a hill, preparing for battle, Rio Segre, Aragón front, near Fraga, Spain]

[Men of the semi-Trotskyist POUM (Partido Obrero de Unificación Marxista) militia, Leciñena, Aragón front, Spain]

[Crowd of men, one standing on a chair talking, Andalusian front, Spain]

[Soldiers walking along snow-covered road, Teruel, Spain]

[Republican militiamen, Aragón front, Spain]

[Refugees leaving, Teruel, Aragón front]