One could argue that the Battle of Yonkers looked like a swarm, as did it when they were called in with music in the south west desert.
Battle of Yonkers was just an overwhelming tide, the army hasn’t figured out the kill shot to the head. There were sword wielding soldiers in the book, can’t picture how they’d succeed against swarm. Walking Dead has it right. May skip World Z. Such a great book, so many compelling vignettes, and looks like Hollywood blew it.