The Rumbling was a disaster that brought on the march of Karl Fritz's Wall Titans across the world, crushing all life there. This happened in 854 when an individual set loose the Titans of the Wall and cracked the Walls. Who did this?

Ymir freely offered the Founding Titan's powers to Eren who ended up desecrating all the Walls on Paradis Island. Eren supernaturally told all of Ymir's subjects with his absolute strength that he had unleashed the Wall, and the Titans were free to crush any life beyond Paradis.

Asked by Vasilii Kulev · Last updated 5 years ago · 160 views · SOURCE