Board Thread:Manga/@comment-3568954-20150810140746/@comment-25933906-20150810142307

Maybe they have no way of creating helium? I don´t know, I have never though about using balloons in the series xD.

However the world of Attack on Titan is quite primitive. They are in a pre-industrial age. The 3D Maneuver Gear is the only machine that works using a steam engine, and it a quite weird engine because there is no combustion in the procress of creating energy.

Another reason why they are not technologically advanced: they want to reconquest the land. Land= Farmlads. The economy is based on food, which is a uneficient, poor and very old system.

The world of Attack on Titan is set in a timeline where the war against the Titans has enhanced the technology related to said war ( like every other war in the history of mankind) Take that away and you have a theocratic, dictatorial monarchy with starving people and poor economy.