As I have been recently reminded, ancient TV and film had a giant horse wheeled into a city with people undetected inside. Maybe real military tactics are overall not great for storytelling.
Modern TV and film are full of these sorts of over-complicated nonsense tactics you could never use in real life, because writers seem to imagine that good military tactics have to be terribly clever, when in fact they generally have to be terribly *reliable* so you can pull them off.