This was the "in crowd" of Paris in the 20s and early 30s: [Louis Aragon]?, [Marcel Duchamp]?, Rene Magritte, Miro, [Max Ernst]?, Dali, Giacometti, Valentine, Hugo, Oppenheim, [Man Ray]?, Tanguy, Prevert, Queneau, to name but a few).
The movement successively drifted left, adherence to the Moscow communist party line became a requirement, and Breton (who would later denounce that same party line) purged those who disagreed with him as the movement gradually splintered and drifted apart, only to reunite in exile in New York in the early forties during World War Two.
Must read: Andre Breton, "Conversations: The Autobiography of Surrealism" (Gallimard 1952) (Paragon House English rev. ed. 1993).