Visual Timeline: Fortification
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6000 BCE: First fortified settlement at Ugarit.
1100 BCE: Hillforts in western Europe.
493 BCE: The first fortifications are constructed at Athens' port of Piraeus.
465 BCE: Construction of the Long Walls fortifications joining Athens to the port of Piraeus are begun.
446 BCE: The Middle Wall fortifications are added to the Long Walls which connect Athens and the port of Piraeus.
429 BCE: Following attacks by Sparta, fortifications at the port of Piraeus are extended to reduce the width of the harbour entrances.
387 BCE: Sparta attacks the Athenian port of Piraeus.