Siege of Constantinople (717–718) and Byzantine navy's destroying of the entire Arab invasion fleet with oil dumped into the sea.
"The Siege of Constantinople (717–718) was a decisive confrontation between the Byzantine Empire and the Umayyad Caliphate, marking a turning point in the early Byzantine–Arab conflicts. The siege ended in a Byzantine victory that preserved the empire and halted further Muslim expansion into Southeastern Europe for centuries.
Maslama’s forces encircled the city by land and sea, but the Byzantines broke the naval blockade using Greek fire, a secret incendiary weapon made from oil that destroyed much of the Arab fleet. "
on the other hand, according to chatgpt, it would cause coastal collapse of all Gulf nations for decades, and cause water crisis for 10s of millions of people:
Desalination crisis →
Gulf states rely on seawater desalination
Oil slicks can force plant shutdowns
If a country like Iran somehow dumped a massive amount of oil into the Persian Gulf, it wouldn’t just be “a big spill”—it would be one of the worst environmental and economic disasters in modern history. But it still wouldn’t destroy civilization. The effects would be severe, regional-to-global economically, and long-lasting.
Here’s what would actually happen:
???? 1) Immediate physical reality
Oil floats and spreads rapidly across the surface
The Persian Gulf is:
Shallow (~35m average)
Poorly flushed (narrow exit via Strait of Hormuz)
???? That means oil would linger and concentrate, not disperse quickly.
???? 2) Massive environmental damage
Marine life gets coated, poisoned, or suffocated
Birds, turtles, dolphins → high mortality
Fish and plankton → ecosystem collapse at lower levels
Oil exposure causes:
Organ damage, reproductive failure, death
Long-term contamination of sediments and food chains
???? Recovery can take years to decades, even after smaller spills.
????️ 3) Coastal collapse (multiple countries)
Oil would wash ashore in:
Iran, Saudi Arabia, UAE, Kuwait, Qatar, Bahrain
Wetlands and mangroves get smothered and die
Beaches become contaminated with tar deposits for years
???? 4) Critical risk: drinking water
This is underappreciated and dangerous:
Gulf countries rely heavily on desalination plants
These plants draw seawater
???? Oil slicks can:
Clog intake systems
Force shutdowns
➡️ That could disrupt water supply for tens of millions of people
???? 5) Economic shock (global)
Even a moderate spill can cost billions
A massive one would:
Shut down fisheries and tourism
Disrupt shipping through the Strait of Hormuz (~20% of global oil flows)
Spike oil prices → global inflation shocks
???? You’d see:
Energy price spikes
Supply chain disruptions
Regional economic damage lasting years
???? 6) Fire vs spill nuance
Some oil would ignite and burn off (especially in attacks)
But most would:
Spread
Partially evaporate
Sink or form persistent sludge
???? Burning reduces volume—but creates toxic air pollution
???? Bottom line
Environmental impact: catastrophic (regional ecosystem damage for decades)
Human impact: severe (water, food, economy disruptions)
Global impact: major economic shock
But:
It would be a regional catastrophe with global ripple effects—not an extinction-level or civilization-ending event.
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