Noun: Phalanx (FAY-lanks)
1. A body of heavily armed infantry in ancient Greece formed in close deep ranks and files; broadly : a body of troops in close array.
2. One of the digital bones of the hand or foot of a vertebrate.
3. A massed arrangement or organization of persons, animals, or things.
Sample sentence: A solid phalanx of armed guards stood in front of the castle.