[Men of the International Brigades in a laboratory of the Medical School building of the University City, Madrid]

[Two Republican soldiers sitting and talking in the street near University City, Madrid

[Two Republican soldiers sitting and talking in the street near University City, Madrid

[Members of the International Brigades with gun, looking out a window, in or around University City, Madrid]

[Two Republican soldiers aiming rifles through barricaded window, University City, Madrid]

[Men of the International Brigades catapulting grenades in the vicinity of the slaughterhouses near the University City, Madrid]

[Member of the International Brigades helping a wounded comrade in the vicinity of the slaughterhouses near the University City, Madrid]

[Men of the International Brigades looking out the windows in a laboratory of the Medical School building of the University City, Madrid]

[Republican bunkers around the Clinical Hospital, one of the principal bastions of the Nationalist rebels in the University City, Madrid]

[Republican bunkers around the Clinical Hospital, one of the principal bastions of the Nationalist rebels in the University City, Madrid]

[Trenches, Madrid]

[Refugee woman standing next to cart, Madrid]

[Men of the International Brigades engaged in house-to-house fighting around the slaughterhouses near the University City, Madrid]

[Men of the International Brigades aiming gun out the window in a laboratory of the Medical School building of the University City, Madrid]

[Men of the International Brigades engaged in house-to-house fighting around the slaughterhouses near the University City, Madrid]

[Soldiers in Republican bunkers around the Clinical Hospital, one of the principal bastions of the Nationalist rebels in the University City, Madrid]

[Member of the International Brigades engaged in house-to-house fighting around the slaughterhouses near the University City, Madrid]

[Member of the International Brigades engaged in house-to-house fighting around the slaughterhouses near the University City, Madrid]

[Loyalist soldier writing, outside Madrid]

[Republican soldiers marching, Madrid]

[Man helping women do laundry, Madrid]

[Line of women doing laundry, Madrid]

[Republican soldiers with tanks and riffles, near Madrid]

[Republican soldier standing by powerlines, Madrid]