How did Marcel Duchamp assist Surrealist exhibitions between 1938 and 1959?

Marcel Duchamp maintained a close association with the Surrealist group, particularly through his friendship with the poet André Breton. Starting in 1938 and continuing through 1959, Duchamp assisted Breton in organizing all Surrealist exhibitions.1

His contributions included:

• Exhibition Organization: He was instrumental in the planning and execution of these events, including a significant Surrealist exhibition held in New York City in October and November of 1942.1
• Collaborative Support: Following his move to the United States during World War II, he continued to work with Breton, including traveling back to Paris in 1947 to assist with another Surrealist exhibition.1

This ongoing collaboration solidified his role within the movement, as the Surrealists were among the few avant-garde groups who recognized his importance during a period when he was largely ignored by official art circles.12