Ships, Crews and Naval Warfare in Italy’s Maritime Republics

The term is a later label for coastal states and cities whose political and commercial power depended heavily on the sea. Their fleets operated around the Italian peninsula, in the Adriatic and across the wider Mediterranean. Amalfi and Gaeta were prominent in the early Middle Ages; from the eleventh century, Genoa, Pisa and Venice became major naval powers, while Ancona and Ragusa also maintained important maritime roles. Their ships and military systems changed over time, especially between the eleventh and seventeenth centuries.

After western Roman power weakened, the volume and organization of Mediterranean trade changed, while the Byzantine navy continued to use oared warships, including the dromon . As coastal trade revived, Italian ports developed shipping and armed forces to protect routes and respond to raids. Their vessels served commerce as well as war, but the balance between those functions differed by ship, city and period.

On this page5 sections

Galleys and sailing ships served different purposes

The galley was a long, relatively narrow ship propelled chiefly by oars, though it also carried sails. Its rowing power made it useful when wind was weak or contrary and allowed it to manoeuvre close to shore, enter confined waters, and support landings. These qualities suited it to patrols, raids, troop transport and close naval combat. Its shallow hull and low sides, however, limited its cargo capacity and made it vulnerable in rough weather. A galley could not stay at sea as long as a vessel with more room for cargo and provisions.

From the thirteenth century, the galea sottile, or slender galley, became a standard Mediterranean warship. It was built for speed and close action, not for carrying large quantities of merchandise. Oars were worked from benches arranged along the hull, with a central passage running between them. Sails helped when conditions allowed, but the oars gave commanders a source of propulsion independent of the wind.

Sailing ships, including cogs and carracks, offered different advantages. Their higher sides made them difficult for low galleys to board, and they could carry more cargo and fight more effectively in rougher seas. Their sailing performance depended on wind, however, and early rigs could be cumbersome to manoeuvre. Galleys and sailing vessels therefore were not simple replacements for one another: they performed better in different waters and conditions.

Ships could also combine commercial and military functions. Venetian state-owned great galleys, developed from the late thirteenth century, carried valuable cargo and passengers while having enough crew to defend themselves. Some reached about 46 metres in length and could carry 140 to 250 tonnes of cargo. A complement of roughly 150 to 180 rowers also gave them considerable manpower if attacked. These vessels could serve long-distance routes, but their size and cargo capacity did not make them equivalent to the smaller, more agile war galley.

Crews, rowing and the work of keeping a fleet at sea

Rowing required coordination across a large crew. In one system, known as alla sensile , two or three rowers sharing a bench each worked an individual oar. It suited skilled, professional rowers. In the a scaloccio system, several people worked one larger oar together, a method that required less individual rowing skill. On the largest galleys, as many as seven rowers could be assigned to an oar.

Crew recruitment changed markedly between the medieval and early modern periods. Free paid rowers and men supplied through civic obligations served alongside fighting crews. Growing sixteenth-century fleets increasingly employed convicts, enslaved people and captives. Venice also adopted forced rowing: a decree of 1542 was implemented in 1545, when Cristoforo Da Canal commanded its first war galley crewed by convicts. Free rowers continued in service as the convict component grew. The organisation of propulsion depended on both skilled coordination and coercive systems of labour.

Rowers supplied propulsion, but soldiers and other fighting crew were also needed. Archers or crossbowmen could attack an opposing deck, while later ships carried gunners and firearms. The galley’s commander had to coordinate movement with fighting: a vessel needed to approach at the right angle, keep its oars clear of the enemy and bring its weapons to bear. A large command galley, sometimes distinguished by a lantern, could serve as a fleet’s flagship.

Galleys depended on regular resupply. Their limited storage meant that crews had to replenish food and water more frequently than crews on larger sailing ships. Ships could put in at ports along a route, and Venetian passenger galleys made successive stops on voyages between the Mediterranean and northern Europe. Galleys were also often beached at night, allowing crews to rest and meals to be prepared ashore. Where a ship had cooking equipment, it could be a simple hearth set in a clay-lined box. These routines made access to safe ports and coastal bases an essential part of galley operations.

Weapons, command and close-range combat

Medieval galleys were designed to fight at close quarters. A projection at the bow, often called a spur, could smash an enemy’s oars and leave the vessel less able to manoeuvre. Ships also exchanged arrows, crossbow bolts and other missiles before trying to board. Boarding parties used the galley’s large fighting crew to overwhelm opponents. Naval battles often depended less on sinking ships than on disabling them and capturing their crews.

Because galleys were strongest in a forward attack, formations and steering mattered. Fleets could form a line abreast, presenting their bows towards the enemy, or arrange ships in a crescent to try to outflank an opposing line. Commanders needed to keep ships together while manoeuvring in a crowded engagement. If two lines closed, vessels could meet bow to bow and fighting would shift to grappling and boarding. A reserve behind the front line could send reinforcements into the battle.

From the late fifteenth century, heavy guns mounted in the bow changed what a galley could do. The guns faced forward, so the ship itself had to be steered to aim them. They could fire at enemy ships or help attack coastal defences; smaller guns along the sides provided additional close-range fire. The forward platform also gave soldiers a place from which to fight or attempt a boarding. Early naval guns had limited range and took time to reload, so a galley might hold its fire until close to its target, then follow a cannon discharge with boarding combat.

Campaigns show how fleets worked in practice

Some early campaigns used fleets assembled from several cities. In 1087, ships from Genoa and Pisa, joined by vessels from Amalfi, Gaeta and Salerno, attacked Mahdia on the North African coast. The expedition illustrates how maritime powers could combine forces for a campaign beyond their immediate shores, even though such cooperation did not remove competition over trade and sea routes.

Defeat could cost a maritime state both vessels and experienced personnel. Genoa’s victory at Meloria in 1284 left many Pisans captive, reducing the city’s ability to rebuild its fleet. At Curzola in 1298, a Genoese fleet defeated Venice and captured its commander Andrea Dandolo. Raiding and battle therefore threatened a city’s pool of trained crews as well as its ships and cargo.

In the War of Chioggia, fighting between Genoa and Venice reached the Venetian lagoon. Genoese forces occupied Chioggia and besieged Venice, but the Venetians assembled another fleet and surrounded the Genoese there, who surrendered. The struggle ended with the Treaty of Turin in 1381. The campaign depended not only on the outcome of battles at sea but on a fleet’s ability to assemble, maintain a blockade and operate in difficult coastal waters.

At Lepanto in 1571, a Christian coalition defeated the Ottoman fleet in a great galley battle. Venice supplied a large contingent, while Genoese commanders and vessels participated within the Spanish system. Heavy guns and boarding troops operated together: artillery weakened enemy ships before close fighting decided their capture. Oared fleets continued to fight major engagements after Lepanto, even as sailing warships became increasingly important.

Mixed fleets and the changing place of the galley

By the sixteenth century, Mediterranean fleets increasingly included both oared and sailing vessels. A galleass, a larger and more heavily armed type of galley, brought some of the weight of a sailing ship to an oared platform. More broadly, fleets could use galleys to carry soldiers and supplies, patrol coasts, or manoeuvre when sailing ships were becalmed, while larger sailing ships carried heavier broadside armament and were better suited to rough water and longer voyages.

During the seventeenth century, sailing warships acquired an increasing role in fleet battles, while galleys remained useful for coastal patrol, towing, troop movement and landings. An oared vessel could move when a sailing ship lacked wind, but supporting its large rowing crew required frequent supplies. The choice of vessel therefore depended on operating waters, available bases and the task assigned.

Naval warfare in the Italian maritime states thus depended on matching a ship to its task. Galleys gave fleets mobility close to shore and a large body of rowers and fighters; sailing ships offered more space, greater endurance and advantages in open or rough water. Crews, provisions, weapons and access to ports shaped what each vessel could accomplish. As ships and guns changed, Italian fleets moved from predominantly oared forces towards mixed systems in which the galley retained a narrower but still practical role.

For the wider setting, see The Maritime Republics of Italy: Trade, Government and Overseas Power.