What do the military generals do? How has their attitude changed, and why?

The highest military generals of the South African defence force and police saluted Mandela and pledged their loyalty. When the military generals saluted Mandela, he was not unmindful of the fact that not too many years ago, they would not have saluted him, but arrested him. This change in attitude was due to the fact that a new, non-racial government was elected and Mandela was then the President of South Africa.