In January 1943, Bousquet aided Carl Oberg in the organization and execution of a massive raid in Marseille, known as the Round up of Marseille. The French police assisted the German police in expelling 30,000 people from the Old Port. They subsequently destroyed the neighborhood, which the German police considered a "terrorist nest" because of its many winding, small streets. Bousquet offered his services for this operation. As the French police controlled the documentation of identity for 40,000 people. With their review assistance, the operation sent 2,000 Jewish Marseillais to the concentration camps.