C162 Four Teammates

However, it was not easy for the Marley Empire to create a nuclear bomb.

This was because the appearance of Titans in this world was, firstly, unscientific. Secondly, they had Titans as a weapon of mass destruction, convenient and practical. There was no doubt about it. As for the pursuit of other weapons, it was not that urgent.

Moreover, the energy source of this world was not coal or oil