A coup d'état (pronounced []), or just coup ([]) for short, is the removal of a head of state and/or head of government from power (overthrow). Unlike a revolution, which usually takes large numbers of people to take over, a coup can be done by a small number of people. Even one person can cause a coup who, Idi Amin for example, controls the country's army. Coups can also be done by other countries, such as the 1953 Iranian coup d'état. One well-known failed coup was the Beer Hall Putsch, where Adolf Hitler tried to take over the government of the state of Bavaria in Germany.