Answer:
Chelmno was the first extermination camp that the Germans established on Polish soil. Murder operations began there on December 8, 1941, and continued intermittently until January 1945. The Jews of the Lodz ghetto and the vicinity were the primary victims deported to Chelmno, where they were murdered by means of gas vans.
The goal was to end segregation in public education
The way you worded the question is a bit odd, but it seems like the answer your looking for is the Japanese Empire.
The Great Migration was the relocation of more than 6 million African Americans from the rural South to the cities of the North, Midwest and West from about 1916 to 1970.
Google says- boys benefited the most