Treachery is a statutory offence in Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

. There was also an unrelated statutory offence bearing that name in the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

, but it has been abolished. Both of these offences were derived from or inspired by the related offence of treason

Treason

In law, treason is the crime that covers some of the more extreme acts against one's sovereign or nation. Historically, treason also covered the murder of specific social superiors, such as the murder of a husband by his wife. Treason against the king was known as high treason and treason against a...

. The name treachery was chosen because it is a synonym

Synonym

Synonyms are different words with almost identical or similar meanings. Words that are synonyms are said to be synonymous, and the state of being a synonym is called synonymy. The word comes from Ancient Greek syn and onoma . The words car and automobile are synonyms...

 for treason.

Australia

The offence is created by section 24AA of the Crimes Act 1914

Crimes Act 1914

The Crimes Act 1914 is a piece of Federal legislation in Australia. Pursuant to the Australian Constitution it prevails in any conflict with State laws dealing with the subject of crime....

.