The Longest Wars Ever To Be Fought In Human History

The Battle of Crecy during the Hundred Years' War.
  • Spanning 681 years, the Roman-Persian Wars were a series of battles fought between the Roman Empire and the Persian Empire from 54 BCE to 628.
  • The Mexican Indian Wars began with the conquest of the Aztec Empire in 1519, sparking a 414-year long conflict.
  • Christian knights from across Europe attempted to reclaim Spanish and Portuguese territories from the Muslim Moors during the centuries-long Iberian Crusades.

Wars have been waged ever since humans developed the first tools and built weapons. While some have defined our immediate existence—both World Wars, for instance—they are in actuality a blip in the annals of military history. In fact, there are dozens of wars that have been fought over decades or even centuries. Starting with the Reconquista and ending with the Mexican Indian Wars, this article will examine the eight longest conflicts in human history.  

8. The Mexican Indian Wars

The Conquest of Tenochtitlán, c.1675.

The Mexican Indian Wars were largely fought between the Spanish colonizers and the indigenous peoples of Mexico. The conflict began with the conquest of the Aztec Empire in 1519. After settling in the Caribbean in the late 1400s, the Spanish formed an alliance with the Aztec’s indigenous enemies to help defeat them in battle.

Violent uprisings occurred over the following several centuries, resulting in years of bloodshed. One such example is the Pueblo Revolt of 1680 in which the Spanish were driven out of modern day New Mexico, only to return twelve years later.

The Mexican Indian Wars finally concluded with the Caste War of Yucatán. The native Maya people took a defiant stance against the Yucatecos, European descendants who held political power. Even though the war officially ended in 1901, small skirmishes continued to break out until 1933, ending the 414-year long conflict.

7. The Arab-Byzantine Wars

Greek fire, first used by the Byzantine Navy during the Arab–Byzantine Wars.

The Arab-Byzantine Wars began in the 7th century with the Arab conquests under the Rashidun and Umayyad Islamic states. The Byzantine Empire lost territory very fast, including Syria and Egypt. At first, they stayed on the defensive, frequently avoiding battle on open fields. It would take over a hundred years before they began launching their own counterattacks.

In 718, the Arab forces failed to capture the Byzantine capital of Constantinople for the second time. After that, the border between both empires remained relatively stable, despite the fact that raids continued to be a common occurrence.

By the mid-11th century, after approximately 421 years of war, the conflict shifted in another direction when the Turks became a new threat to both forces. In the end, the Byzantine Empire suffered greatly, having lost a lot of territory, while the Arabs increased their presence in parts of the Middle East and Africa.

6. The Ottoman Wars in Europe

Conquest of Constantinople by Sultan Mehmed the Conqueror in 1453.

The Ottoman Wars—also known as the Turkish Wars—were fought between the Ottoman Empire and various European powers over the course of 653 years. The conflict began in 1265 with the Byzantine-Ottoman Wars, which led to the ultimate downfall of the Byzantine Empire.

War continued to ravage the continent. Between the 14th and 16th centuries, the Ottomans managed to conquer the Balkans and much of Central Europe, subjugating people like the Serbs, Bosnians, and Hungarians.

Continued war with the Russians in the 18th century and two Serbian uprisings and the Greek Wars of Independence in the 19th century marked the beginning of the Ottoman Empire’s decline. During World War I, they prevented the British Royal Navy from attacking Istanbul, but besides that, they lost most of their European territory. They were ultimately defeated in 1918, bringing an end to their dominance.

5. The Germanic Wars

ercingetorix Throws Down His Arms at the Feet of Julius Caesar by Lionel Noel Royer, 1899.

The Germanic Wars were waged between the Romans and the early Germanic peoples. The violence began in 113 BCE when the Cimbri and Teuton tribes migrated into territory controlled by the Roman Republic. Despite the fact that Rome experienced heavy losses, they emerged victorious.

For years, the Romans demonstrated their military might, but by the 5th century, that prestige had begun to waver. While the Vandals were causing mayhem beyond the Alps, King Alaric and his Visigoth “barbarians” were laying siege to Rome. They offered to spare the city in exchange for annual payment and a place in the military hierarchy, but Emperor Honorius refused.

In 410, rebel slaves and gladiators discretely opened the gates for the Visigoths, who proceeded to sack the city over the course of three days. Similar violence continued into the 6th century through various raids and battles. After 681 years of war, the conflict finally came to an end in the year 569.

4. The Roman-Persian Wars

A rock-face relief at Naqsh-e Rostam, depicting the triumph of Shapur I over the Roman Emperor Valerian and Philip the Arab. Image credit: Fabienkhan/Public domain

Spanning 681 years, the Roman-Persian Wars were a series of battles fought between the Roman Empire and the Persian Empire from 54 BCE to 628. Similar to Reconquista, religious differences did play a minor role, but with each empire determined to expand their borders, the dispute was largely territorial.

The Mithridatic Wars marked the beginning of the conflict. Both sides experienced several victories and defeats, gaining and losing territory over the course of the 681 years. Regardless, the borders between both empires remained largely unchanged.

Such a period of violence left both sides exhausted and weakened, leaving them vulnerable to the newly united Arab army. The Persian Empire crumbled quickly and completely collapsed. During the ensuing Byzantine-Arab Wars, most of the Roman Empire’s territories were lost, leaving them Anatolia, parts of the Balkans, and Italy.

3. The Byzantine-Bulgarian Wars

The Byzantines sack the Bulgarian capital Preslav.

When the First Bulgarian Empire formed in 681, it sparked 715 years of war with the Byzantine Empire, also known as the Eastern Roman Empire. Interested in territorial expansion toward the southwest, the Bulgarians experienced early victories.

By the 10th century, the Bulgarian Empire was weak because it was engaged in multiple wars, including one with Russia. In 1018, it fell to the Byzantine Empire. After a series of failed rebellions, however, they were able to succeed in reclaiming most of their territory as the Byzantine Empire was having internal troubles.

Despite the signing of an eventual treaty recognizing the Second Bulgarian Empire, the violence did not stop. The conflict continued until 1396 when Bulgaria was defeated by the Ottoman Turks. Fifty-seven years later, the Byzantine capital of Constantinople also fell to the Ottomans.

2. The Anglo-French Wars

More details Battle of Cuddalore (June 20th 1783) between the French navy commanded by the Bailli de Suffren and the British one under the orders of Rear-Admiral Edward Hughes.

The Anglo-French Wars were a series of clashes between England and France that began in 1066 when William, the Duke of Normandy, and 7,000 French soldiers invaded England. A distant cousin to the previous king, William believed he had a legitimate claim to the English throne. This skirmish resulted in a violent feud that lasted just under 750 years.

Perhaps the most famous conflict between these two rivals is the part of the Seven Years’ War known as the French and Indian War. The bloodshed resulted in an English victory, removing France as a threat from their westward expansion into North America.

The conflict finally drew to an end in 1815 with the Hundred Days War. Napoleon Bonaparte, having recently been sent into exile, returned to France to reclaim Paris. England and several other countries formed a coalition to engage against the Frenchman in the Battle of Waterloo, ultimately bringing an end to his reign. Napoleon was sent into exile again, this time to the island of Saint Helena where he died six years later.

1. Reconquista

Moors and Christian Battle of Marrakesh taken from Cantigas de Santa Maria.

The Reconquista—also known as the Iberian Crusades—was a series of military campaigns that lasted 781 years. The conflict began in 711 when North African Muslims captured the Iberian Peninsula from the Visigoths. In the 11th century, Christian knights from across Europe attempted to reclaim the Spanish and Portuguese territories. The resulting war gained much support from the various popes throughout the years.

In 1085, the Christians experienced their first major victory when King Alfonso VI captured Toledo, the capital of Spanish Christendom. Over a century later, the Muslim Moors lost the battle of Las Navas de Tolosa, a stunning defeat from which they would never recover. By 1252, only Granada remained in their control. When the city fell in 1492, the centuries-long conflict was finally brought to an end.

Religion did play a role in the Iberian Crusades, but for a long time, it was mostly about land gains and financial rewards. Under Christian rule, many mosques were converted into churches, but several were left alone to allow the Muslims that remained to continue practising their religion. The violence that defined the Reconquista would later inspire the Spanish and Portuguese conquest of the New World.

The Longest Wars Ever To Be Fought In Human History

RankWar or conflictsStart dateEnd dateDuration
1Reconquista7111492781 years
2Anglo-French Wars10661815748 years
3Byzantine-Bulgarian wars6801355715 years
4Roman–Persian Wars54 BC628681 years
5Germanic Wars113 BC569681 years
6Ottoman wars in Europe12651918653 years
7Bulgarian-Ottoman conflicts13041913609 years
8Serbian–Ottoman conflictsOctober 1352May 1913560 years and 7 months
9Croatian–Ottoman warsOctober 1443October 1878435 years
10Arab–Byzantine wars6291050421 years
11Mexican Indian Wars15191933414 years
12Byzantine–Arab wars7801180400 years
13Yaqui Wars15331929396 years
14Polish–Russian Wars15581939381 years
15Philippine revolts against Spain15211898377 years
16Yemeni–Ottoman conflicts15381911373 years
17Moroccan–Portuguese conflicts14151769354 years
18Russo-Turkish wars15681918350 years
19Arauco War15361883347 years
20Dano-Swedish wars14701814344 years
21Spanish–Moro conflict15651898333 years
22Ottoman–Venetian wars25 September 139621 July 1718321 years
23Apache–Mexico Wars16001915315 years
24American Indian Wars16091924315 years
25Russo–Swedish Wars14951809314 years
26Ottoman–Persian Wars15141823309 years
27Burmese–Siamese warsOctober 1547May 1855307 years
28Hispano–Moroccan wars16811958277 years
29Viking invasions of England7931066273 years
30Navajo Wars16001866266 years
31Ottoman–Habsburg wars15261791265 years
32Byzantine–Seljuq wars10481308260 years
33Polish–Ottoman Wars14431699256 years
34Ottoman–Portuguese conflicts14811718237 years
35Chechen–Russian conflict1785Ongoing235 years
36Warring States Period453 BC223 BC230 years
37Anglo-Spanish Wars15851808223 years
38Byzantine–Ottoman Wars12651479214 years
39Polish–Teutonic War13081521213 years
40Roman conquest of the Iberian Peninsula218 BC19 BC199 years
41Franco-Moroccan conflicts17651958193 years
42Cossack uprisings15911775184 years
43Russo-Persian Wars16511828177 years
44Spanish conquest of Chiapas15231695172 years
45Muscovite–Lithuanian Wars13681537169 years
46Russian conquest of Siberia15801747167 years
47Fitnas656819163 years
48Ottoman–Hungarian Wars13661526160 years
49Polish–Swedish wars15631721158 years
50Anglo-Dutch Wars16521810158 years

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