Red Cross doctors tried to treat both royalist and republican casualties in Yemen in the 1960s. Pascal Grellety-Bosviel went on to help found the charity Medecins sans Frontieres.

Red Cross doctors tried to treat both royalist and republican casualties in Yemen in the 1960s. Witness Pascal Grellety-Bosviel first journeyed to the frontline, to reach injured fighters, in November 1964. He later went on to help found the charity Medecins sans Frontieres.

Photo: Royalist fighters in the mountains. Keystone Features/Getty Images