Throughout the ages, a handful of mercenary outfits have punched far above their weight, often deciding the fate of empires and battles with a blend of skill, daring, and sheer firepower. These ten elite mercenary forces left an indelible mark on the annals of warfare, even though modern weaponry eventually rendered their traditional tactics obsolete. Their stories still echo today as exemplars of martial excellence.

10 Elite Mercenary Legends Unveiled

10 Genoese Crossbowmen

The Genoese crossbowmen earned a reputation as some of the most proficient and disciplined ranged troops in medieval Europe. Their claim to fame rested on naval engagements, where their precision and rapid fire outclassed rival archer units across the continent. The secret weapon? A crossbow capable of delivering more than six bolts per minute, a staggering rate for the era.

Established in 1338, these marksmen defended the Republic of Genoa and were hired out as mercenaries by a slew of Italian city‑states and foreign monarchs. Their squads typically comprised a shooter flanked by two assistants – one shielding the archer and the other wielding a second bow to keep the volley flowing at breakneck speed.

9 Winged Hussars

The Winged Hussars emerged in the 16th century as an elite Polish cavalry unit, originally forged from displaced Balkan mercenaries. Clad in flamboyant armor and sporting the iconic feathered “wings” on their backs, they combined intimidation with protection, creating a visual spectacle on the battlefield.

Armed with long, thrusting lances, these heavy shock cavalrymen could deliver devastating charges that often pierced multiple foes in a single pass. Their most celebrated triumph came at the 1683 Battle of Vienna, where they helped shatter the Ottoman siege and turn the tide of European history.

When firearms began to dominate the field, the Winged Hussars struggled to adapt, gradually losing their edge. Yet their striking appearance and battlefield reputation endured, cementing them as a legendary component of the Polish‑Lithuanian Commonwealth’s military heritage.

8 Landsknechte

Landsknechte were German mercenaries famed for their ferocious pike squares and flamboyant attire. Originating in southern Germany during the late 15th century, they served as heavily‑armed infantry for the Holy Roman Emperor Maximilian I and soon became coveted by rulers throughout Europe.

These soldiers fought in tightly‑packed pike formations, supplementing their spears with weapons such as the massive zweihänder two‑handed sword, the short katzbalger, and the early matchlock arquebus. Their eye‑catching dress – oversized flat hats, bright braids, and billowing sleeves – earned them a reputation as the most stylish fighting force of their day.

As gunpowder weapons proliferated, the Landsknechte’s traditional tactics lost effectiveness, leading to their gradual decline despite their earlier battlefield successes.

7 Ten Thousand

The Ten Thousand were a band of Greek mercenaries who played a pivotal role in the 401 BC rebellion of the Persian prince Cyrus against his brother. Though the overall campaign faltered, the Greek contingent triumphed on its own flank, showcasing their effectiveness as a disciplined fighting force.

Before the fifth century BC, mercenaries were a rarity in the Greek world, with most city‑states relying on citizen militias. However, the prolonged conflict between Athens and Sparta spurred a surge in professional soldiers, especially from poorer, war‑prone regions like Thrace, feeding the rise of groups such as the Ten Thousand.

6 Condottieri

The term condottieri refers to the leaders of Italian mercenary bands from the mid‑14th to the 16th centuries. Initially composed of foreign fighters, these contractors were hired by city‑states through formal agreements known as condotte. Figures like Sir John Hawkwood of England and Italians Muzio Attendolo Sforza and Braccio da Montone became notorious for both their battlefield prowess and their willingness to switch allegiances for personal gain.

The practice of hiring professional soldiers grew out of the feudal wars that plagued Europe from the 11th century onward. Condottieri wielded considerable leverage, often betraying or even seizing power from their patrons. Their actions were famously dissected by Machiavelli, who warned of the perils of relying on such mercenary forces.

5 Gurkhas

The Gurkhas hail from the Nepalese town of Gorkha and first caught British attention during the 1814‑16 Gurkha War. Though the Nepalese were defeated, the British were so impressed by their ferocity and skill that they recruited many as mercenaries for the East India Company.

Over the ensuing centuries, Gurkhas distinguished themselves in both World Wars and countless other conflicts, easily recognized by their iconic eighteen‑inch kukri blade. More than 19,000 Gurkhas have fallen while serving under the British flag, and they have also been employed by forces in Singapore, Malaysia, and India. Their legacy continues to fuel debate over whether they should be regarded as regular members of the British Army rather than merely hired troops.

4 Flying Tigers

The Flying Tigers were a famous group of American volunteers who flew for China against Japan during World War II. Formed in 1941, they were dispatched to the Chinese front to bolster the defense against Japanese aggression, operating under the charismatic leadership of Lieutenant General Claire Lee Chennault.

Renowned for their shark‑faced Curtiss P‑40 Warhawk fighters, the squadron carried out daring aerial sorties despite being outnumbered and often facing technically superior enemy aircraft. Their tenacity and skill earned them a legendary status in the early Pacific theater.

3 Varangian Guard

The Varangian Guard served as the elite personal bodyguard corps for Byzantine emperors, beginning with Basil II in 988 AD. Initially recruited from Viking raiders famed for their double‑edged battle‑axes, the Guard became synonymous with unwavering loyalty and battlefield effectiveness.

Stationed permanently at Constantinople’s Great Palace, these shock troops protected the imperial throne and were famed for their distinctive gear, including the heavy rhomphaia sword and sturdy shields. Notably, the legendary Harald Hardrada, who later ruled Norway, counted among their ranks.

2 Grand Catalan Company

The Grand Catalan Company, also known as the Catalan Company of the East, rose to prominence in the early 14th century as a formidable mercenary force. Composed mainly of soldiers from Catalonia and Aragon, they operated across the eastern Mediterranean, offering their services to any ruler willing to pay.

Formed in 1302 by veterans of the War of the Sicilian Vespers, the Company initially defended the Kingdom of Sicily before evolving into an independent mercenary army. Their disciplined tactics and battlefield successes kept them in high demand throughout the Middle Ages.

However, growing ambitions led to friction with their Byzantine employers. In 1311, the Catalans rebelled, seizing the Duchy of Athens and establishing a short‑lived dominion that lasted until 1388.

1 Swiss Pikemen

After breaking away from the Holy Roman Empire in the 14th century, the Swiss Confederacy forged one of history’s most effective infantry forces. Early Swiss soldiers wielded a mix of halberds, crossbows, swords, war clubs, and even flails, adapting to the terrain and enemy tactics with remarkable ingenuity.

Swiss commanders excelled at exploiting local geography, winning battles against numerically superior foes through innovative, terrain‑specific tactics. The 1422 Battle of Arbedo marked a turning point when they adopted the long pike as their primary weapon, forming deep columns that proved both offensive and defensive marvels.

Their reputation for discipline and effectiveness spread far beyond the Alps, making Swiss mercenaries highly sought after by armies across Europe for centuries to come.

Colombia, Poland, Venezuela, Ireland, Sweden, Morocco—the list goes on. For hundreds of years, Scottish soldiers have taken the opportunity to earn money by fighting in foreign lands. In other words, they were mercenaries. Sometimes these Scottish soldiers of fortune supported established monarchs, while on other occasions, they fought with rebels anxious to upend the status quo. But wherever they went and whoever they fought, the results most often were tales well worth the telling.

10 Peter McAleese

A Glaswegian born in 1942, Peter Maltese led a band of mercenary fighters to Colombia in 1989. McAleese had an impressive pedigree for his role as the commander of a motley bunch of soldiers of fortune. He’d served with Britain’s feted elite force, the SAS. In a documentary film about his life, McAleese reinforced his image as an all-around tough guy, saying, “I was trained to kill by the Army, but the fighting instinct came from Glasgow.”

McAleese left the army in 1969 and drifted into the shadowy world of mercenary fighters, seeing action in African hotspots such as Angola and what was then Rhodesia and is now Zimbabwe. But why did he travel to Colombia? In a barely credible turn of events, he’d been hired by the Cali Cartel to kill the leader of its main rival, the Medellin Cartel. In other words, McAleese’s mission was no less than to assassinate Pablo Escobar. The Scotsman and his buddies were to helicopter into Escobar’s compound. But McAleese’s chopper crashed in the Andes, injuring him badly. The plot was aborted. McAleese escaped and died in 2021, aged 79. Escobar was killed in a gun battle in 1993.^[1]

9 Gregor MacGregor, Prince of Poyais

Born on Christmas Eve 1786, Gregor MacGregor launched his military career conventionally enough by joining the British Army’s 57th Foot Regiment while still only a 16-year-old. The young man saw action in the Napoleonic Wars and eventually attained the rank of major before hanging up his sword in 1810. For his next adventure, his eyes turned to South America, and he arrived in Venezuela in 1812.
MacGregor was acquainted with the revolutionary leader General Francisco de Miranda, who accepted him into his forces as a colonel in the fight against the Spanish colonialists. MacGregor, who had awarded himself a knighthood, rose to be a general in the Venezuelan Army. His exploits included an attempt to seize Florida from the Spanish and a bid to found a colony in Nicaragua.

His most grandiose scheme, however, saw him taking the title of Prince of Poyais as he developed a colony in the Bay of Honduras. To do so, he enticed gullible British investors and prospective colonizers with false claims. They lost all their money, and the colony was a total disaster. Somehow, “Prince” Gregor walked away unscathed.^[2]

8 Patrick Leopold Gordon of Auchleuchries

Born in the northeast of Scotland in 1635, Patrick Gordon first left his native land while still a teenager. He traveled to the Polish city of what was then Danzig and is now Gdańsk, where he enrolled at a Jesuit college. A war between Poland and Sweden erupted in 1655, and that was when the young Gordon first became a mercenary. It seems he was none too choosy about who his employers were since he fought on both sides during the hostilities.

In 1661, Gordon walked away from both Poland and Sweden, electing to join the Russian army. With the rank of major, he gave useful service in 1661 by crushing civil disturbances in Moscow. After Peter the Great came to power in 1696, Gordon became a key adviser and even friend to the young Tsar, earning the rank of general. He played an important part in suppressing an attempted palace coup against Peter in 1698. He died a year later.^[3]

7 James Francis Edward Keith

Keith was a high-born Scot, the second son of the 9th Earl Marischal of Scotland. Despite that, he was forced to leave his homeland after becoming involved in the unsuccessful Jacobite attempt to seize the British throne in 1715. Fleeing to France, Keith ended up in Spain, where he became an officer in the Spanish Army. But since he was a Protestant in a Catholic country, his prospects were poor, so he left for Russia.

In 1728, Keith was made a colonel of a Russian regiment and fought against the Swedes. After his time with the Russians, it seems that Keith was keen for new pastures, and he joined the Prussian Army, seeing extensive action in the Seven Years’ War that convulsed much of Europe and North America. By now a Field Marshall, Keith fought at the 1758 Battle of Hochkirch in Germany when 80,000 Austrians faced 31,000 Prussians. The Austrians routed the Prussians killing 9,000 of them, including Keith.^[4]

6 Archibald Ruthven of Forteviot

Archibald Ruthven was born into a distinguished Scottish family—his father was Lord Ruthven. In 1572, Ruthven sailed for Scandinavia, where he accepted a post in the army of the Swedish king, Johan III. Johan’s first order was that the Scot should return to his homeland to recruit 2,000 mercenaries. In the event, he returned to Sweden with nearly 4,000 soldiers.

Ruthven became embroiled in a bitter dispute about his soldiers’ pay which resulted in the execution of one Scottish officer for embezzlement, Hugh Cahun. Before he was put to death, Cahun accused Ruthven, baselessly as far as we know, of plotting the assassination of King Johan. Apparently in the clear, Ruthven now sailed for Livonia on the Baltic Sea with his troops. There, a bitter dispute with their German allies resulted in the deaths of some 1,500 men. The upshot of this deadly squabble was that Ruthven was again accused of plotting against Johan. Despite his denials, the unfortunate Scot was imprisoned and died in jail.^[5]

5 Sir Harry Aubrey de Vere Maclean

Born into a well-to-do Scots family in 1848, the splendidly named Sir Harry Aubrey de Vere Maclean joined the British Army in 1869 and saw service in Canada, Gibraltar, and Bermuda. After seven years in the army, Maclean resigned his commission and accepted the position of a drill instructor in the army of the Sultan of Morocco, Mawlay Hassan.

Not long after he arrived in Tangier, Mclean took command of 400 infantry troops, with an increase in pay dependent on him learning Arabic, which he did. Abdul-Aziz succeeded Hussain as the sultan and retained Mclean’s services, sending him on missions to various Moroccan provinces. But life in Morocco was not without its perils; in 1907, the Scotsman was kidnapped and held for ransom for seven months. The following year Abdul-Aziz was deposed by his own brother Mawlay Abdul-Hafiz. The new sultan was minded to keep Mclean on, but the two couldn’t agree on a contract, so Mclean resigned, living out his days in Tangier until his death in 1920.^[6]

4 Peter Duffy

Raised in the northern Scottish town of Elgin, Peter Duffy was born into some privilege in 1941. He was sent to Gordonstoun, the same private school that King Charles attended a few years after. Later in life, Duffy was second-in-command of a group of mercenaries who went to engineer a coup in Seychelles Island in 1981.

Duffy’s commander was “Mad” Mike Hoare, a notorious mercenary of many years. Hoare and Duffy led a group of fighters drawn from ex-Rhodesian soldiers and ex-South African special forces. Armed to the teeth, the men flew into Seychelles aboard a commercial flight. Unfortunately for Duffy and his comrades, an airport official noticed an AK-47 in one man’s luggage. A gunfight ensued, and Duffy and others made good their escape by hijacking an Air India plane, leaving behind one dead comrade. Several of the conspirators were tried the next year in South Africa. Duffy got five years, Hoare 10. Duffy died a broken man in 1981.^[7]

3 George Sinclair

In 1612, Captain George Sinclair sailed from Scotland with a troop of Scottish mercenaries that he’d recruited in Caithness in the Scottish Highlands. They were to join the cause of King Charles IX of Sweden, who was fighting his neighbor Christian IV of Denmark. Sinclair and some 300 men landed in Norway with the intention of marching to Sweden.

The Scots had not bargained for the possibility that the Norwegians might not take kindly to a mercenary force tramping across their country. As it happened, the Norwegians were not at all happy. Seven days after Sinclair and his men had arrived on Norwegian soil, a local force launched a deadly ambush. As the Scots entered a narrow valley, the Norwegians rolled boulders down the slopes to block their escape routes. Once the rocks had been unleashed, musketeers picked off the mercenaries, killing more than 150. Sinclair was shot dead by a man named Berdon Sejelstad. The Scotsman’s wife and child, who had unwisely accompanied the ill-fated expedition, were also killed, although not before the woman had stabbed one of the Norwegians to death.^[8]

2 Redshanks

The Redshanks were mercenaries mostly recruited from the islands of the Hebrides off the coast of northwest Scotland, although mainland Highlanders joined in as well. In the 16th century, they went to fight for the Irish as they opposed the English invaders of the Emerald Isle. Life in the Highlands and islands of Scotland could be very tough, and men were glad to earn money paid to those who fought for Irish lords.

In one case, a regiment of Highland fighters came as a kind of wedding present. That was in 1569 when the Scottish Lady Agnes Campbell, daughter of the Earl of Argyll, married the Irish nobleman and chief Turlough Luineach O’Neill. She brought 1,200 Scottish mercenaries to the marriage. Unsurprisingly, the English were none too happy about the continual influx of Highland warriors arriving in Ireland. From the late 16th century, the English authorities began to pay off Highland clan chieftains. The payments—bribes might be the correct word—were made on the condition that the chiefs kept their men at home.^[9]

1 Alexander Leslie of Auchintoul

Alexander Leslie of Auchintoul was born into a landowning Scots family in 1590—Auchintoul is in the northeast of Scotland. Leslie started out fighting for the Poles in 1618 when he was captured by the Russians. They released him, and by 1629, he was employed by the Swedes. The Swedish king, Gustav II Adolf, sent him to Moscow, and Leslie tarried there in the service of the Tsar.

The Smolensk War, a conflict between Poland and Russia, broke out in 1632, and Leslie brought regiments of mercenaries from European countries, including England and Scotland, to fight for the Tsar. Returning to Scotland in 1637, Leslie embroiled himself in the Civil War of the time, on the wrong side. Captured in battle in the Scottish Borders, he narrowly escaped execution, the fate of many of his comrades. However, he was banished and never allowed to return to Scotland. Leslie returned to Russia, where he achieved the rank of general, the first Scot to do so. His achievements included seizing Smolensk from Polish control in 1654.^[10]