Throughout history, prisoners have been executed by hanging all over the world. In most cases, people who are hanged are ordinary people (nobles are often beheaded), so hanging is regarded as a symbol of dishonour. So many war criminals who participated in World War II were hanged.

In addition, as far as the situation at the end of World War II is concerned, hanging was also the least painful and most civilized method at that time.

In a sense, this is also the most humane method.

Hanging is not like shooting, it is bloody, and it needs to be reinforced if it doesn't hit the key parts, causing people much pain.

Injection of death penalty was not mature at that time, and there seems to be no information to show which country or region adopted the method of injection of death penalty.

During hanging, the prisoner fell from a height, and his neck was suddenly strangled by the noose, which led to the fracture of cervical vertebra and the destruction of central nervous system. People have no severe pain.

Even if the cervical vertebra does not have this segment, the carotid artery will be compressed by lasso, which will immediately block the arterial blood vessels and eventually lead to brain hypoxia and death. During this period, people feel no pain because of lack of oxygen in the brain.