Why are there outlying towns/cities on the walls in Shingeki no Kyoujin?


For example, this here:

[![enter image description
here](https://i.stack.imgur.com/bF0tw.jpg)](https://i.stack.imgur.com/bF0tw.jpg)

Why does it need to jut out of the walls instead of just being inside the
walls to begin with?




It is explained in manga Chapter 2 afterwords.

[![Wall and
district](https://i.stack.imgur.com/QEpbw.jpg)](https://i.stack.imgur.com/QEpbw.jpg)

You should realize, that walls are long. I mean, _really_ long. And it is
impossible even to watch over wall, not to mention protecting it. So such
districts do exist, to attract all titans attention, since it is much easier
to protect small district than miles of wall.




It is explained in manga Chapter 2 afterwords.

[![Wall and
district](https://i.stack.imgur.com/QEpbw.jpg)](https://i.stack.imgur.com/QEpbw.jpg)

You should realize, that walls are long. I mean, _really_ long. And it is
impossible even to watch over wall, not to mention protecting it. So such
districts do exist, to attract all titans attention, since it is much easier
to protect small district than miles of wall.

