How did migration lead to the population of the world?

explanation:

hitler's  "rise" can be considered to have ended in march 1933, after the reichstag adopted the enabling act of 1933 in that month. president paul von hindenburg had already appointedhitler  as chancellor on 30 january 1933 after a series of parliamentary elections and associated backroom intrigues.

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.