the.com/legion

means An immense, often overwhelming number of people or things, especially one implying organized force or multitude.

from From Latin legio, the basic unit of the Roman army — several thousand soldiers raised and organized as one body, from legere, 'to choose, levy, gather.' The word's leap to 'vast multitude' owes much to the Gospel of Mark, where a demon-possessed man declares 'My name is Legion: for we are many' — a line that fixed the word in the language as shorthand for countless, massed numbers, military order included.