Answer:
The statement is False
Step-by-step explanation:
While it is true that a large number of African Americans immigrated to California during the war years to work in the defense industries that were set up there (especially in Los Angeles metropolitan area), that migration is not known as the "Great Migration".
What historians refer to as the Great Migration, is the migration of African Americans from the South, to the industrial cities in the North, during the first decades of the twentieth century.