Hanno the Navigator: The greatest explorer of the ancient world who you've never heard of
In the early 5th century BC, a Carthaginian commander named Hanno was traditionally said to have sailed past the familiar boundaries of the Mediterranean and ventured down the Atlantic coast of Africa.
Sent by the leading merchants of Carthage, he commanded sixty penteconters and a large number of settlers, possibly in the thousands based on ship capacity, in an expedition that may have reached the forests near the equator in modern Gabon.
His account was later preserved in a Greek text known as the Periplus of Hanno and described flaming mountains, wide rivers, unknown animals, and encounters with coastal peoples who had never seen outsiders.
Carthage and the Punic drive for expansion
At that time, Carthage controlled a growing sea trade network that stretched across the western Mediterranean, and its influence was based in the ports and trade routes that stretched from the Gulf of Tunis to southern Iberia.
Traditionally founded by Tyrian settlers around 814 BC, Carthage had developed into a major trading centre that depended on its naval fleet and trade agreements, along with its ability to manage regional colonies.
Its ruling families, governed by elected suffetes and a powerful council, had invested heavily in colonisation as a way to protect trade and expand their access to strategic resources.
Since they maintained control over key sea lanes and island ports, Carthaginian navigators had developed the expertise to round the Pillars of Heracles and establish a presence along the Atlantic coast of North Africa.
Settlements near Lixus and the island of Mogador offered secure anchorage and resupply points for fleets, which allowed merchants to engage with inland populations.
From those locations, Carthaginian expeditions began to move farther south, and they relied on seasonal currents and local knowledge.
For this reason, Hanno’s voyage formed part of a calculated effort by the Carthaginian state to expand its economic and territorial reach outside familiar coasts.
Since his fleet carried both sailors and settlers, and his account mentions the establishment of new towns, the expedition combined exploration with colonisation.
Carthage sought to exploit distant trade opportunities, assert control over rival interests, and increase its influence in a region rich in animals and gold, along with ivory.
The voyage south: the 'Periplus of Hanno'
According to the Periplus, Hanno departed from Carthage with sixty ships and thousands of men and women chosen for settlement.
The account claims that he founded seven new colonies along the route. After the fleet crossed the Straits of Gibraltar, it moved down the Atlantic coast of Africa, where it stopped at various locations to found colonies and trade with locals as the Carthaginians explored the surrounding land.
At each point, Hanno recorded brief but informative observations about the geography and wildlife, along with the people he encountered, though he left few detailed measurements or precise directions.
Initially, he encountered tribes along the Moroccan coast who raised cattle and lived near rivers and coastal plains.
As the fleet pressed southward, the expedition encountered crocodiles and hippopotamuses in areas that also supported large herds of elephants.
This suggested that they had entered a tropical or subtropical zone, well outside the regions known to Greek or Roman geographers.
Soon after, Hanno reached an island called Kerne, which he used as a base for further southward travel.
The Periplus also references places such as Thymiaterion, though it is unclear whether this was a settlement, a headland, or a landmark.
Its name offers clues to Punic toponyms adapted into Greek. Many scholars have proposed that this island might correspond to a possible island near the Bay of Arguin, though its exact location is still uncertain.
At a later stage of the voyage, the Periplus described a fire-spewing mountain that lit up the night sky.
After he passed this peak, Hanno reported an encounter with strange, hairy creatures that the interpreters called gorillai.
His men killed three of them, brought back their skins, and found them too wild to capture alive.
Although ancient readers regarded the story as odd, modern interpretations suggest that these animals may have been great apes such as gorillas or chimpanzees, though the term later influenced the naming of the gorilla species by European explorers.
Some historians have proposed that the description may also reflect interactions with local forest-dwelling groups that were later misinterpreted due to changes in language during translation.
Evidently, navigation had become more difficult the farther the fleet travelled.
Hanno mentioned contrary winds and dangerous currents along unfamiliar coastlines that slowed progress and increased the risk of being stranded.
Still, the descriptions of lush vegetation and animals from areas near the equator in a region of volcanic terrain support the idea that the expedition may have reached as far south as present-day Gabon.
However, since the names of rivers and peoples had been rendered into Greek from Punic, it is still impossible to determine the exact route with certainty.
Interpretations and controversy
Over time, the Periplus of Hanno had become the focus of much debate, and ancient writers such as Pliny the Elder and Arrian, who mentioned the journey, treated it as an unusual account from a foreign tradition rather than a serious geographic source.
By the Renaissance, European scholars began to examine the text more closely, comparing its descriptions with known coastlines and climate zones, and attempting to reconstruct the journey using maps from their own time.
To support the credibility of the voyage, some historians have drawn on evidence from climate and ocean patterns.
For example, the description of the volcano corresponds to known features of Mount Cameroon, and the reported wildlife matches habitats found only south of the Sahara.
Moreover, Carthaginian seafarers likely understood how to exploit the Canary Current and the Guinea Current, which would have carried them south along the West African coast before returning northward via the Azores Current.
This knowledge suggests that the expedition relied on careful planning and hands-on seafaring experience.
Even so, the absence of Punic archaeological evidence south of southern Morocco has complicated efforts to verify the extent of the journey.
Many potential coastal sites remain unexcavated or hidden because shorelines had shifted, the desert had spread, and the amount of archaeological investigation in the region had been limited.
Since the Roman destruction of Carthage in 146 BC led to the loss of Punic texts and historical records, the Periplus survives only in Greek, which was likely copied several generations after the original inscription.
Its brevity and the lack of reference to fixed geographic coordinates make interpretation difficult, though the consistency of its descriptions supports its reliability.
In terms of purpose, Hanno reported the foundation of new towns and the resupply of his fleet, along with attempts to communicate with foreign peoples, all of which indicate a mission designed to identify new trade opportunities.
Given the scale of the fleet and the number of settlers on board, this undertaking almost certainly required months of preparation and substantial state resources.
Legacy and historical impact
As mentioned above, after the Roman destruction of Carthage, its written records had included navigational logs and temple inscriptions, and they had been destroyed or scattered, which left only fragments of its ideas and learning preserved in hostile or indifferent sources.
For this reason, Hanno’s name faded from mainstream historical memory, even though his journey probably pushed farther along the Atlantic coast than any other known voyage of the ancient world.
Today, historians regard the Periplus as one of the oldest surviving accounts of long-distance maritime exploration.
It provides a clear idea of how Punic mariners documented geography and understood new places.
Long before the Portuguese explored the Gulf of Guinea or the Spanish mapped the African coastline, Hanno had recorded descriptions of fire-lit peaks and tropical animals along forested shores that no Greek or Roman is known to have seen.
Although his expedition did not result in permanent settlement south of the Sahara, it showed a rare capacity for exploration that is still unmatched in ancient exploration literature.
His journey can be compared with that of Himilco, a contemporary Carthaginian navigator who explored the Atlantic coasts of Europe in the opposite direction.
His journey demonstrated that Punic knowledge reached well outside the bounds of the Mediterranean.
While later generations celebrated Herodotus, Strabo, and Ptolemy for their geographic works, Hanno had already walked the coasts personally.