I really love stuff like this AT-AT cross-section infographic. I could read stuff like this for hours. I think it’s from one of the Star Wars cross-section books, but I’m not sure which one.
The AT-AT armored transports were first seen in The Empire Strikes Back and it really illustrated to viewers what a massive force the Empire was, that it could move machines of this scale and use them in combat. They may be giant and fully armored, but everything has a weakness, as Luke soon found out. This infographic tells you everything you ever wanted to know about the AT-AT transports.