Board Thread:Theories/@comment-27938131-20160922094959/@comment-27321453-20160922101545

It's possible. I don't know what else could protect the people living in the place Grisha originally came from except for big seas... or they're advanced enough to repel the Titans maybe? Cuz when Keith first found Grisha he said there was an unusually low number of Titans around and it could have been the same for when RBAM reached the Walls but they had encountered only one Titan, which was Ymir but maybe it was an Abnormal which took them by surprise and ate Marcel but when Bertolt broke the Wall, Annie supposedly called the far away Titans with her shriek.