The events of World War 3 were very devastating, not just to the Lanima Region but also to the world of Lexus, all nations, cities, countries, and even smaller towns participated in the war, causing many lives, many properties destroyed, and technologies lost.
Not just several technologies lost, but a being was able to take all of our current technology, it was one of the first unnatural events that Lanima Region has ever witnessed, basically returning the region to the Stone Age, leaving no technology behind.
The hardest part to swallow? That being was the founding leader of all technology, we did not know that he will do this so we didn't suspect his inventions, we were foolish, for him to imbed a sort of chip inside of all the technology he has ever created, allowing him to control them to his whim.