User blog:Gourgeist/i'm a little confused about the Walls? Someone care to explain?

Hi,

I'm just curious about where the Squads ventured outside of the Walls... Because Wall Maria was the outermost Wall that was breached by the Colossal Titan, right? And then the Armored Titan breached the back gate. So where exactly did they venture out in the 57th Expedition?

If they went outside of all of the Walls, which is pretty obvious, wouldn't that mean they'd have to go into Wall Maria and even Shiganshina? What was the point of venturing out if they could just find Eren's Basement?

Thanks for any help :)