Acies triplex
Acies triplex, the triple formation, was a military formation used by the Roman legions of the republic period. It was introduced as a result of the reform of the Roman army in the 4th century BCE (so-called Camillian reform), which transformed the structure of the Roman army from a rigid phalanx to a much more flexible manipulative. Acies triplex was formed according to the quincunx – scheme of a five-element geometric pattern.
