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She is also President of the International Brigade Society,(succeeding the late Jack Jones when he died) commemorating the volunteers who enlisted to fight Fascism in the Spanish Civil War, she met her much older partner, David Marshall, having been a member of the Brigade.
Ruth Levitas is the daughter of trade unionist and Spanish Civil War International Brigade fighter Maurice Levitas, niece of Communist Stepney councillor and Battle of Cable Street veteran Max Levitas and sister of theatre historian Ben Levitas.
During the Spanish Civil War (1936–1939), the Connolly Column, an Irish volunteer unit of the 15th International Brigade, sang the song while fighting against Francisco Franco's nationalists.
Amongst the British members of the International Brigade that Lomon fought alongside were the trade union leader Jack Jones and writers George Orwell and Laurie Lee.
His younger son Lewis Clive (1910–1938) won a gold medal for rowing at the 1932 Olympics and was a member of the International Brigade in the Spanish Civil War, killed in action in August 1938.
On 18 July 1956, the German Democratic Republic issued the Hans Beimler Medal to veterans of the XI International Brigade, and other volunteer units in Spain.