On 13 August 1521, after a siege of some three months, the island city of Tenochtitlan — capital of the Mexica and seat of the Aztec Empire — fell, and its last ruler, the tlatoani Cuauhtémoc, was captured trying to escape across Lake Texcoco by canoe. The empire that had dominated central Mexico for nearly a century was broken. The popular image of that conquest — a few hundred Spaniards under Hernán Cortés overthrowing a civilization of millions — is a myth that flatters the conquerors. The fall of Tenochtitlan was achieved by an army that was overwhelmingly Indigenous, fighting alongside a small Spanish contingent, against a Mexica population already devastated by an epidemic the invaders had brought.
The Aztec Empire that fell was a Mexica-led order, the dominant partner in a Triple Alliance with Texcoco and Tlacopan formed around 1428, which extracted tribute from much of central Mexico through war and the threat of war. Tenochtitlan, built on an island in the lake and laced with canals and causeways, was one of the largest cities in the world, with a population estimated in the hundreds of thousands — larger than most European capitals of the age. Its empire was wealthy, sophisticated, and militarily formidable. It was also resented: the peoples it had subjugated and from whom it demanded tribute and captives were, in many cases, willing to ally with anyone who might break Mexica power.
The mechanism of the conquest rested on three pillars, none of them Spanish superiority alone. First and most important were the tens of thousands of Indigenous allies — above all the Tlaxcalans, an independent people the Mexica had never conquered, who supplied the bulk of the fighting force, the local knowledge, the food, and the manpower without which the small Spanish company could not have taken the city. Second was smallpox, introduced by the Europeans in 1520, which swept Tenochtitlan and killed an enormous share of its people — including the ruler Cuitláhuac — gutting the defense before the final siege began. Third was the siege itself: Spanish-built brigantines cut the lake, the causeways were taken block by block, and the aqueduct supplying fresh water was severed, so that the city fell as much to thirst, hunger, and disease as to assault.
The fall of Tenochtitlan inaugurated three centuries of Spanish colonial rule over the heart of Mesoamerica and a demographic catastrophe — driven above all by epidemic disease — that reduced the Indigenous population of central Mexico by perhaps nine-tenths over the following century. Moctezuma II, the ruler when the Spanish arrived, died in Mexica captivity to the invaders in 1520; Cuauhtémoc, who led the final defense, was kept prisoner, tortured for gold, and hanged in 1525. The empire was not so much defeated in a battle as dismantled by alliance, disease, and siege.
The Inca Empire — Tawantinsuyu, “the four parts together,” the largest state in the pre-Columbian Americas — was broken in 1533 when a small Spanish expedition under Francisco Pizarro seized its ruler, the Sapa Inca Atahualpa, at Cajamarca on 16 November 1532, extracted an immense ransom in gold and silver, and then executed him. The capital, Cuzco, was occupied a year later, on 15 November 1533. The empire that fell ruled some ten to sixteen million people across roughly two million square kilometres of the Andes, from southern Colombia to central Chile, governed by a road system of some 40,000 kilometres and a bureaucracy without writing.
The conquest was not the feat of a handful of Spaniards overawing a docile people. Two catastrophes had struck the Andean world before Pizarro’s 168 men ever reached the highlands. The first was epidemic disease: smallpox, introduced to the Americas by Europeans, swept south ahead of any European traveller and killed the Sapa Inca Huayna Capac around 1528, together with his designated heir. The second flowed from the first — a ruinous civil war of succession between two of Huayna Capac’s sons, Atahualpa and Huáscar, the “war of the two brothers,” which had torn the empire apart and ended only months before the Spanish arrived.
Pizarro exploited both. He landed in a state still bleeding from civil war, its institutions concentrated in the sacred person of an emperor, and he struck at that person directly. Atahualpa, fresh from victory over his brother and camped at Cajamarca with an army that may have numbered in the tens of thousands, agreed to meet the strangers; in a coordinated ambush the Spanish slaughtered thousands of unarmed retainers and took the Sapa Inca alive. With the emperor a hostage, the machinery of a centralized empire could be turned by the hand that held him.
The other decisive element was Andean, not European. The Inca had built their empire by conquest within living memory, and many of the peoples they ruled — among them the Cañari, the Huanca, the Chachapoya, and the Chanka — resented Cuzco and joined the invaders in their tens of thousands, supplying the manpower without which 168 foreigners could have done nothing. The fall of the Inca Empire was an Andean civil catastrophe that Spain harnessed; it should be understood, and remembered, from the side of the peoples who lived it.
On 13 March 1591, on a plain near Tondibi just north of the city of Gao, the army of the Songhai Empire — the largest state in the history of West Africa — was broken by a small Moroccan expeditionary force that had crossed the Sahara armed with gunpowder weapons. The Songhai, fielding tens of thousands of cavalry and infantry under their ruler Askia Ishaq II, met an invading column of a few thousand men sent by Ahmad al-Mansur, the Saadi sultan of Morocco, and commanded by a renegade soldier named Judar Pasha. The Songhai had the numbers; the Moroccans had arquebuses and cannon. Within roughly two hours the Songhai army was routed, and the great cities of the Niger bend — Gao, Timbuktu, and Djenné — passed out of imperial control.
The empire that fell had risen barely more than a century before. Building on the older trading kingdom centered on Gao, Songhai expanded into an imperial power under Sonni Ali, who took control around 1464 and conquered Timbuktu and Djenné, and reached its height under Askia Muhammad, who reigned from 1493 and welded the western Sudan into a single administered state. At its peak Songhai controlled the middle Niger and the trans-Saharan trade in gold, salt, and other goods across a domain of well over a million square kilometers — a wealthy, literate, Islamic civilization whose scholars made Timbuktu a center of learning.
The mechanism of the fall combined a fatal internal weakness with a decisive technological gap. After the death of the long-reigning Askia Daoud in 1582, Songhai was destabilized by a bitter dynastic struggle that brought Askia Ishaq II to a contested throne and left the empire divided at the moment it most needed unity. Into that opening came al-Mansur’s invasion. The Moroccan sultan, drawn by the legendary wealth of the Sudanese gold trade and equipped with firearms the Songhai lacked, gambled on sending a force across one of the world’s harshest deserts. Most of that force perished or turned back on the crossing, but the survivors carried a weapon that the proud Songhai cavalry could not answer.
The encounter at Tondibi made the gap plain. The Songhai are said to have driven a herd of cattle at the Moroccan lines to break them, but the noise of gunfire turned the stampede back onto their own ranks, and the massed arquebus and cannon fire shattered an army built for an earlier kind of war. The victory destroyed Songhai as an imperial power, but it did not give Morocco a usable empire in its place: the conquerors could neither govern nor hold the vast region across the desert, and the middle Niger fragmented into a patchwork of smaller states. West Africa’s greatest empire ended not in a long decline but in a single afternoon, undone by a civil war at home and a handful of guns from across the Sahara.
The Vijayanagara Empire — the great Hindu power that had dominated southern India for more than two centuries from its capital at Vijayanagara, the city now known by its ruins at Hampi — was broken on 23 January 1565 at the Battle of Talikota, also called the Battle of Rakshasi-Tangadi. A coalition of four Deccan sultanates — Bijapur, Ahmadnagar, Golconda, and Bidar — combined against it and annihilated its army. The empire’s aged de facto ruler, the regent Aliya Rama Raya, was captured on the field and beheaded. In the weeks that followed, the victorious armies plundered and burned the capital, one of the largest and richest cities on earth, over a period of some five months; it was never reoccupied, and its ruin is permanent.
The empire that fell at Talikota was not in obvious decline. Founded in 1336, Vijayanagara had reached extraordinary heights under Krishnadevaraya in the early sixteenth century and remained, in 1565, immensely wealthy and militarily formidable. Its capital, described by Persian and Portuguese travellers as a city of perhaps half a million people, rivers of trade, and palaces and temples without equal, was reckoned among the greatest cities in the world. What destroyed it was not slow rot but a single catastrophic battle — and the political miscalculation that brought four normally divided rivals together against it.
The mechanism of the fall lay in diplomacy as much as on the battlefield. For decades Vijayanagara had thrived by playing the mutually hostile Deccan sultanates against one another, intervening in their quarrels and tilting the balance to its own advantage. Under Rama Raya this policy grew overbearing, and his interference and reputed arrogance drove the sultanates, despite their own deep rivalries, into an unprecedented alliance sealed by marriage. At Talikota their combined cavalry and superior artillery overwhelmed the Vijayanagara host; by several accounts two Muslim commanders within Rama Raya’s own army defected at the crucial moment. With Rama Raya dead, the army disintegrated.
The consequences reshaped southern India. The capital’s destruction ended Vijayanagara’s role as the paramount power of the south and opened the peninsula to the expansion of the sultanates and, in time, the Mughals. A diminished Vijayanagara survived for decades under the Aravidu dynasty from new capitals, but the empire as a great power was finished. The abandoned city, stripped and burned, became the haunting field of ruins at Hampi — a UNESCO World Heritage Site that preserves, in scorched granite, the scale of what was lost.