In addition to its military/naval uses, the bicorne was widely worn during the nineteenth and early twentieth centuries by civilian officials in European monarchies and Japan, when required to wear uniforms on formal occasions. This practice generally ceased after World War I except in the context of diplomatic uniform. However British colonial governors in temperate climates and governors general in some countries of the Commonwealth (notably Australia, Canada and New Zealand) continued to wear bicornes with ceremonial dress until the second half of the twentieth century.