ouster
noun /ˈaʊstə(r)/
  /ˈaʊstər/
(North American English)- the act of removing somebody from a position of authority in order to put somebody else in their place; the fact of being removed in this way罢免;废黜;革职 - the president’s ouster by the military军方对总统的废黜 
 
- the president’s ouster by the military