"the war in Spain"

The Spanish Civil War took place between 1936 and 1939.

The struggle between the Republican government and anti-communist Nationalist forces (sometimes known as insurgents, Francoists or Fascists) culminated in victory for the Nationalists, led by General Franco.

Both sides received support from abroad: the Republican cause was supported by anti-fascist volunteers from many countries who formed International Brigades; whilst various groups, including 700 Irish followers of Eoin O'Duffy, supported the Nationalists.

As Cordelia stayed on in Spain after the Nationalist victory, and was (as is noted later in the text) awarded a medal by the 'authorities', the implication is that she supported the fascist side in the conflict.