The final war between the Persian and Byzantine empires

The western Roman Empire fell in the 5th century CE amid invasions, weakness

A mix of over-expansion, political instability, a weak military and economy, and the broad invasion of the Eurasian Huns prompted the downfall. Its eastern half, the Byzantine Empire, would last for another millennium.

A map of the Byzantine Empire

This map, hosted on the World History Encyclopedia, shows the Byzantine Empire in four eras. The area shaded dark purple is the original Eastern Roman Empire. The light purple areas represent the conquests of Justinian. The dark purple line surrounds the middle Byzantine Empire. The hatched area, finally, indicates the small “Latin Empire” established after the Fourth Crusade.

The Sykes-Picot agreement as seen through Arab eyes

After WWI, the borders of the Middle East were redrawn by two men: Mark Sykes (UK) and Francois Picot (France). Signed in 1916, their secret agreement divided one of the most volatile regions in the world into states, cutting through ethnic and...

History shows what’s wrong with the idea that war is ‘normal’ in the Middle East

An old trope claims that war is ‘normal’, innate, and inevitable in the Middle East. However, the history of the region reveals complex and civilized systems of coexistence. Empires found economic and political strength in fostering diversity;...

What was the Fourth Crusade?

Originally destined for Jerusalem, the Crusaders became entangled in a Byzantine civil war, and found themselves besieging the greatest city in Christendom. After breaching the sea walls and subjecting the city to the worst sack in its history, they installed a Flemish nobleman as Latin emperor of Constantinople.

The rise and fall of the Byzantine Empire

A short but informative TED-Ed video summarizing the most important aspects of Byzantine civilization: how it all started, why Constantinople was so special, a few remarkable Byzantine authors (including Princess Anna Comnena, historian of her father’s reign), the Ottoman conquest, and why don’t just call the Byzantines “Romans.”

Maritime trade in the Mediterranean accelerated during the late Bronze Age

This map illustrates the vibrant trade networks of the eastern Mediterranean during the Late Bronze Age (circa 1500–1200 BCE), highlighting an era of growing interconnectivity among major powers including Egypt, the Hittite Empire, Mesopotamia, and others.

See how the rivalry between Iran and Israel has remade the Middle East

This 2025 documentary explores how the relationship between Iran, Israel, and the United States has shaped Middle Eastern geopolitics for decades. The film covers events leading up to and following the 2025 12-day war involving these nations.

Could water scarcity cause future wars in the Middle East?

The MENA region is facing a looming water crisis that could lead to future conflicts. While water scarcity isn't new in the Middle East, the region is among the most water scarce in the world. Home to only 1% of the world's fresh water...

Explaining the final battle of World War I

The Meuse-Argonne Offensive was the last battle of the First World War. Beginning in September and ending November 11, 1918, the battle was a tumultuous event and the first time the American Army fought on the world's stage. America simultaneously achieved victory and discovered new methods to fight a war. This Apple History podcast provides the details.

The century-long debate over religious images in Byzantium

The iconoclast controversy, which tore Byzantium apart in the eighth and ninth centuries, centered on the use of sacred images (or icons) in Christian worship. The Iconoclasts (literally, “icon smashers”) regarded sacred images as sacrilegious; their opponents, the Iconophiles (“icon lovers”), defended icons as aids to personal devotion. After decades of struggle, the Iconophiles prevailed; their victory ensured that icons, and the brilliant mosaics inspired by them, remained a feature of Byzantine churches.

How the Arab Spring engulfed the Middle East – and changed the world

The Arab Spring engulfed the Middle East, unleashing consequences that still shape the world today. In 2011, the Arab Spring began with protests in a small Tunisian city. Those protests led to an era of uprisings and civil war in the Arab world,...

The ancient succession drama that led to the Sunni-Shia divide

The split that divided Islam into its major branches comes down to succession: after Muhammad's death, Sunnis backed an elected leader, Abu Bakr, while Shia Muslims sided with a member of Muhammad's bloodline, his cousin and son-in-law Ali. That 7th-century disagreement shapes geopolitics today, Ramadan's traditions, and communities worldwide.

The rise of ISIS, explained in 6 minutes

The Islamic State of Iraq and Syria (ISIS) is incredibly powerful, and has seemingly done the impossible. The group has seized vast areas of the Middle East to form a mini-state it calls a reincarnation of the ancient Caliphate. Since forming, ISIS has waged war with all of its neighbors and has launched deadly terror attacks all over the world. This six-minute video, by Vox, outlines the history and rise of ISIS.

King Philip’s War devastated Native resistance in colonial New England

Decades of rising tension over land and sovereignty erupted in 1675, when Wampanoag leader Metacom led a Native alliance against English colonies. The 14-month war ended in catastrophic defeat, killing thousands and shattering organized Native power in the Northeast.

Critics of Alexander the Great see him as power-hungry and ruthless

Arguments against his greatness include that he likely murdered his father for the throne, poorly led his territories, and only conquered one empire despite touting greater feats. Proponents argue that he was a skilled military leader and helped usher in the Hellenistic Age, where Greek cultural influence spread across Europe and Asia.

The warrior women of Ancient Scythia who inspired the Greek Amazons

Greek literature regales readers with tales of Amazon queens and warriors going toe-to-toe with heroes, including Achilles and Hercules. This article explores why these female warriors were relegated to myth. For a long while, it was believed that these stories about all-female warriors were just stories. But scientists have since found evidence that these ancient warriors were part of the nomadic tribes of Scythia, and more discoveries are expected.

The bubonic plague spread in three waves over 600 years

The Black Death refers to the first wave of the plague, which swept through Europe in the 14th century and killed 25 to 50 million people. Caused by the bacterium Yersinia pestis carried by fleas (often on rats), the human toll was roughly one-third of Europe's population at the time.

Mohammad Reza Shah Pahlavi ruled Iran for nearly four decades before being ousted by the revolution

The last Shah of Iran came to power in 1941 and pursued rapid Westernization through his controversial reforms. His authoritarian rule, backed by the US, and his feared secret police, SAVAK, fueled mass resentment that ultimately drove him from power in 1979.

Iran-Iraq war drained over $1T from the combined economies of Iran and Iraq

Across eight years (1980-88), Iran and Iraq each lost about $500 B in GDP, infrastructure destruction, military expenses, disrupted oil exports, and mounting debt—totaling over $1 T in economic damage.

What did the world of the dinosaurs look like?

Mesozoic means "middle life" and this is the time of the dinosaurs. This era includes the Triassic, Jurassic, and Cretaceous Periods, names that may be familiar to you. It ended with a massive meteorite impact that caused a mass extinction, wiping out the dinosaurs.

A Roman mosaic records the outcome of a retiarius–secutor fight

Displayed at the National Archaeological Museum, this mosaic depicts the classic retiarius–secutor battle. The lower panel shows the bout under referees’ supervision; the upper panel declares Astyanax vicit, with a symbol confirming his opponent was killed.

Caesar and Cleopatra's complicated affair

The Egyptian queen Cleopatra, a known charmer in history, had a public affair with Roman leader Julius Caesar. Read this article for details and a timeline of their doomed romance—from their first meeting to her later affair with Marc Antony.

Catalonia and the War of the Spanish Succession

The War of Spanish Succession (1702-1715) was an international and civil war that reshaped Europe’s political landscape and brought Catalonia under Spanish rule. Created by the Museum of the History of Catalonia in Barcelona, this virtual exhibit guides readers through the 13-year war with a specific eye for its effects on Catalonia. Galleries of artwork from the period on the right-hand side of the page help immerse visitors in the history.

Evidence of opium use dates to as early as 5000 BCE

Archaeological evidence shows the use of the poppy plant for its pain-killing properties likely originated in the Mediterranean before making its way to the East and West via trade. It has since inspired two eponymous wars, and highly addictive derivatives of the naturally occurring substance have led to an ongoing overdose crisis.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

The Russia-Ukraine conflict is the largest ground war in Europe since World War II in terms of casualties, forces mobilized, and displacement of civilians.

Iran's Revolutionary Guard Corps is independent of Iran's regular army and is one of the most powerful and influential military-political organizations in the Middle East.

Volcanic activity may have triggered the Black Death by spewing gases that led to crop failures in Europe, thus forcing the import of grain ships with plague-infested fleas.

Stanford built a Google Maps for the Roman Empire, revealing how much it cost to travel in the ancient world

The term 'algorithm' originated from the Latinized name of al-Khwārizmī, a 9th-century mathematician whose works introduced Arabic numerals and the decimal-based numeral system to Europe and whose treatise 'Al-Jabr' gave algebra its name.

Take a 3D tour of the Hajj, Islam's annual pilgrimage to Mecca, undertaken by over 1.5 million Muslims.

Apeirophobia is an overwhelming fear of living forever, perhaps stemming from the brain's inability to conceptualize an infinite life.

For centuries, it was common to sleep in two shifts: a few hours at the beginning of the night, and a longer period beginning around midnight

While the sun's gravity keeps the planets in orbit, their gravity also pulls on the sun, causing it and everything else in the solar system to orbit around a mutual balance point called the barycenter—the true center of the solar system.

See the evolution of Ebola vaccine and treatment development.

Waves off the coast of Nazaré, Portugal, can reach over 100 feet and are caused by the area's deep underwater canyon geography

The concept of phantom limbs, the perception that amputated limbs are still present, dates back to a French military surgeon in the 16th century.

In 2019, a laptop loaded with six of the worst malware in history and described as 'an exhibit of historical weaponry' sold for $1.3M.

Chaos theory—informally known as the butterfly effect—is the reason why weather forecasts are presented with probabilities rather than certainties.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

The hormonal disorder PCOS was renamed PMOS in 2026, a move designed to improve care and research by shifting the focus to the hormonal causes of this condition that affects 1 in 8 women.

Before humans, the Soviet Union and the United States sent animals—including apes, dogs, and cats—to space during the Space Race.

The Mona Lisa's celebrity status and repeated restorations have obscured what made the painting so revolutionary for its time

Brandi Chastain, the star of the 1999 US victory over China in the 1999 Women's World Cup, was a last-second choice to take the penalty kick that sealed the victory.

The Nasdaq's 'Magnificent 7' companies are responsible for roughly 40% of the Nasdaq 100 index's gains, while the remaining 93 companies account for the other 60%.

In 2018, 26-year-old missionary John Allen Chau was killed by tribesmen after attempting to reach and evangelize on India's isolated North Sentinel Island

See how fireworks are made and learn how metals like magnesium and copper are responsible for different colors.

The boiling temperature of water decreases with increasing elevation because the molecules need less energy to overcome the lower atmospheric pressure associated with thinner air.

Electrical grids worldwide must double their power delivery capacity by 2050 to meet surging demand from AI and electric vehicles.