Edward listens to Levi's explanations, and they make him feel a bit better. He's not the only person here hopelessly outclassed by the technology, thank goodness.

"I wonder if we're from somewhere similar." Edward didn't see the reaction, but he heard the shift in Levi's tone. "Either that, or two worlds decided gas was an appropriate way to fight a war."

There is an undeniable bitterness to his tone.