The term 'Coup d'oeil' is a French phrase meaning 'a glance' or 'a quick look'. It is often used to describe a brief, but comprehensive overview of a situation. The term 'Coup d'etat' is also a French phrase meaning 'a sudden overthrow of a government'. It is usually used to refer to a violent and illegal seizure of power from a government by a small group of people. Both terms are related in that they both refer to a sudden and decisive action.