

In episode 1, and also explained by Mr. Hannes, there are titans scratching
the outside of Wall Maria (before the breach caused by the colossal happened).

Did the garrisons still fire their cannons at these titans, or did they let
them be since they normally can't get through the wall?


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question
attack-on-titan
Did the garrisons ever use the cannons on top of Wall Maria to fire at the titans before the breach happened?


As stated [from the wiki](http://attackontitan.wikia.com/wiki/Cannons):

> Cannons (壁上固定砲 Kabe jō kotei hō?) were the primary weapon used to engage the
> Titans before the development of Vertical Maneuvering Equipment.

It doesn't say explicitly that _the cannons were used on these specific days
to defend the wall_ , but it does state that they were the primary defense
before 3D Maneuvering Equipment, so we can _assume_ that they were used before
the Colossal Titan attacked.

We can also infer with reasonable suspicion that these cannons were used on a
case-by-case basis. This means that if a titan is small and unlikely to cause
harm to the wall or be a threat to humanity, it may not be worth it to waste
cannon ammo and time trying to exterminate it. However, if a larger titan is
scratching at the wall, the appropriate military personnel will likely make
the call to engage, using the cannon.


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answer