Tech Tree Inception?! Yep! 😀
So, the series is over until more info is being found. I hope you enjoyed it! 🙂 Italian ships are truly great and important. They make up for a (mostly) complete tree – after the Soviets, British and the Kriegsmarine which will be implemented sooner.
That being said, I leave you the tech tree (CLICK IT TO MAKE IT BIGGER):