Movie Star Wars [Episode III] All Terrain Opened Transport (AT-OT)

Although these eight-legged walkers were well-armored and equipped with four laser cannons for defense, their open tops made them extremely vulnerable to attacks from above. AT-OT walkers had enough seats for at least 34 clone troopers, but they could carry more troops if required, thanks to the open-bed design. The vehicle's defenses included two forward cannons and two tail cannons. The AT-OT was not used for attack, it was mainly used for carrying a vast number of clone troopers onto the battlefield