Stelae from Hermopolis show a Ptolemaic unit having a standard-bearer and other staff attached. This unit was like a Roman Maniple, being composed of two smaller units led by a Hekatontarch (i.e. a Centurion). The title of Hekatontarch appeared around the 150s BC. As well as this, Asclepiodotus describes in his 'Tactica' a new institution, the Syntagma, which had a standard-bearer, other staff and was composed of two smaller units led by Hekatontarchs. The Phalangarkhia, also described by Asclepiodotus, was about the size of a Roman Legion in strength. The potential Roman influence would have been great. In Ptolemaic Egypt, Roman adventurers and veterans are found commonly serving under the Ptolemies. Romans are found in Ptolemaic service as early as 252/1 BC. The Ptolemaic army was odd in that, out of all the Hellenistic armies, it was the only army where you could find Romans in Greek service. As Sekunda suggests 'such individuals would have spread knowledge of Roman military systems within the Ptolemaic military and political establishment'.