A troop formation is an organized arrangement of military personnel, typically used to maximize the effectiveness of a unit. ECHELON (7 letters) is a type of formation in which troops are arranged in a V-shape, with each successive row slightly offset from the one before it. LINE (4 letters) is a formation in which troops are arranged in a single row. ARRAY (5 letters) is a formation in which troops are arranged in multiple rows. RANK (4 letters) is a formation in which troops are arranged in a single column. Phalanx (7 letters) is a formation in which troops are arranged in a close-order formation, with shields overlapping. SQUAD (5 letters) is a formation in which troops are arranged in a small group.