noun
legion
LEE-jun/ˈliːdʒən/
A very large number of people or things.
A legion of pebbles forms a densely packed heap.

Etymology
A gathered body of soldiers broadened into the idea of a very large number.
A very large number of people or things.
A legion of pebbles forms a densely packed heap.

A gathered body of soldiers broadened into the idea of a very large number.