The line comes from the 2006 film 300, where King Leonidas shouts This Is Sparta before kicking a Persian messenger into a pit. Esto Es Esparta is the Spanish language version of that moment, and clips of the shout spread widely as a meme in the late 2000s. Spanish speaking creators kept reusing the audio for exaggerated confrontations and mock heroic scenes. Its short build and explosive delivery make it instantly recognisable, even for viewers who have never seen the full film.