A coup d'état, often abbreviated to coup, is the overthrow of a lawful government through illegal means.
If force or violence are not involved, such an event is sometimes called a soft or bloodless coup.
In another variation, a ruler who came to power through legal means may try to stay in power through illegal means, thus preventing the next legal ruler from taking power.
This is a chronological list of such coups and coup attempts, from ancient times to the present.
Scholarly databases and lists of coups include the following: