How did Hideki Tojo gain control and maintain power to become dictator

"In this day, Hideki Tojo, prime minister of Japan, grabs even more power as he takes over as army chief of staff, a position that gives him direct control of the Japanese military. ... Having earned a reputation for sternness and discipline, Tojo was given command of the 1st Infantry Regiment upon returning to Japan."

This is for United States History, I just went through this look at the other questions by entering the question into the search and you’ll find different ones to choose from!! Have a great day, God bless!