Thera in 218 B.C.

Thera — Ptolemaic Egypt › The Overseas Empire.

The high, crescent island of the southern Cyclades, chosen as a permanent Ptolemaic naval station with a standing garrison — one of the few fixed military bases the dynasty maintained on Greek soil. From its fortified heights the fleet commands the approaches to the central Aegean and the sea-road between Egypt and the islands of the league.