"War declared by all," is the shocking headline of the Onion piece, used by ABC in its Culture section on Saturday.
El ABC da por cierta una portada de la revista satírica The Onion (ABC Cultural, página 11) pic.twitter.com/08jqWsaQcK— angelitoMagno (@angelitoMagno) July 5, 2014
"This is the front page US newspaper the Onion ran on August 5th 1914," ABC wrote, explaining its use of the article and its intriguing graphic to illustrate a feature on the centenary of the outbreak of the First World War.
But the Onion article — first published in 2006 and then reprinted in the book Our Dumb Century — is pure satire, as the subheadings suggest.
"Ottoman Empire almost declares war on itself," one of these reads.
"Nations struggle to remember allies," another states.
The US-based Onion, founded in 1988, has spent over two decades mocking media conventions. Occasionally other media outlets have been fooled into running its stories as news.
In 2012, ABC itself reported on how Chinese government newspaper The People's Daily ran as fact another satirical Onion story which named North Korean leader Kim Jong-un as the world's sexiest man.