Which wall did the armored titan knock down?
I think that second wall didn't have a name because throughout the anime and manga they were only talking about the wall of maria. I think that the walls with names are the main walls, but those other walls are just extra layers of the wall. Like if you notice in the later episode there was the big wall, then a wall in a "u" shape that have houses inside that u. The wall of maria was probably something similar to that. The colossal titan kicked down the first layer of the wall and the armoured titan took down the second. Well thats just my guess don't take my word for it.
Goku(DBZ) vs Captain Levi (Attack on titan)? WHO WILL WIN IN A FIGHT!??
The only Goku that might have a harder time would be BoS Goku. That Goku, with a powerlevel of 10, is the weakest but still twice as strong as any normal human being. Levi isn't twice as strong as a human being, stronger than the average human but in no way twice as strong. Also, depending on where the battle takes place, Goku might be at an advantage or disadvantage: If it's in a forest, town or generally a place where the 3D maneuver gear would be very practical, Goku might find himself a bit struggling to keep up with the constantly moving Levi. If it's in a place with little to no higher objects like a wasteland, Goku defeats Levi in less than half a minute. In the end, Goku that has learned the Kamehameha would easily pick apart Levi. Before that, Levi has a very small chance of victory. ... oh wait, this is DBZ Goku, not Dragonball Goku! Never mind, he gets anally raped by his own blades before thrown to the titans.
What has happened in the manga of Attack on Titan?
Levi and Hanji tortured a member of the military police because they thought he killed Nick (who held valuable info about titans). They ripped his nails off, broke his nose, and ripped his teeth out. This is in chapter 53 or around there.