Board Thread:Manga/@comment-5239435-20160910030604/@comment-29919227-20160910051237

1)The Reiss couldn't control the titans cuz, as explained by Rod Reiss, Frida wasn't able of using her power to the fullest. The reason why the Reiss were unable to attack the other humans is kinda obvious: Titans will attack any human they see so driving them towards a specific large target, in this case the lands were the people outside the walls live, would be unnecesary. Titan will attack them weather the Reiss order it or not. Plus the titans serve another porpouse that is keeping the people trapped inside the walls. So, if the titans weren't able of exterminating the outsiders by there own this means that they had developed a method o device (like the walls) that keeps the titans away from them. This means tha even if the Reiss ordered the titans to attack the result would have been the same.2) Grisha killed the Reiss family (unawared that Rod escaped) and then he was probably suposed to head back and report it. The people outside the walls couldn't get to close to Wall Sina cuz then they might have been controled by the Firts King's heir, so they used Bertolt to breach the wall and then waited for Grisha so they could be sure every Reiss was dead. Grisha did come back but when he did he learnt what had happened to Carla so he changed his plans, and didn't report the situation. Not knowing for sure if the Reiss were dead the people from outside had to change their plans as well. That's why the attacked the walls in the exact same way five years later. They don't wanna destroy inocent people, the want the titans to desappear and for that they need the coordinate. This time Reiner and Annie were supoused to retrieve the coordinate but another unexpected thing happened, Eren showed up. 3)It was said by Uri Reiss that the Reiss family at some point in history started a battle with the Ackerman and the Asians. This war probably started because both families learnt the truth about humanity not being extint so the attempted to overthow the Reiss. 4) Again, Rod Reiss himself explained that Frida wasn't able to use all her power proficiently and that's why she couldn't protect the wall and why she couldn't defeat Grisha.