What is OTAN? NATO?
https://www.nato.int/nato_static_fl2014/assets/pictures/2011...
I wish there was a rule that forced people to spell out an acronym the first time they use it, regardless of how much they think the acronym is common knowledge.
It kinda is common knowledge though, the French version is right on the official flag and displayed all the time.
Organisation du traité de l'Atlantique nord