The Calculus of War

History isn't just written—it’s calculated. Analyzing WWII, the Cold War, and global conflict through the cold lens of data and analytics.

[The Calculus of War @calculusofwar]

A U-boat that broke through could only sink so many ships before being driven off — a number independent of convoy size. So the bigger convoy lost the same ships spread across twice as many hulls. Loss rate, roughly halved. No new weapons. Just math.

[The Calculus of War @calculusofwar]

To beat the U-boats, the Allies made their convoys bigger.
Every captain said it was suicide.
The math said the opposite — and it was right.
Losses scale with a convoy's edge, not its size. Double the ships, the perimeter barely grows. Geometry won the Atlantic. 🧵👇

[The Calculus of War @calculusofwar]

How the Ghost Army built an army from nothing 👇

🎈 Inflatable tanks, trucks & guns — light enough for a few men to lift, convincing from the air.
🔊 Sonic deception
📻 Fake radio traffic

What story should we cover next? 👇

[The Calculus of War @calculusofwar]

German scouts looked down on a valley filled with an entire army — tanks, trucks, thousands of men.

None of it was real.

How a few hundred American artists fooled the German army with rubber and sound 🧵🖊️

[The Calculus of War @calculusofwar]

Petrov's reasoning: why would the US start a war with only 5 missiles? A real first strike would launch thousands.

He trusted that logic over the screen.

The cause turned out to be sunlight glinting off high clouds, fooling the satellites.

[The Calculus of War @calculusofwar]

In 1983, a Soviet computer reported five US nuclear missiles inbound.

One officer was supposed to report it up the chain. Instead he called it a false alarm.

He was right — and that's the only reason you're alive. 🧵🖊️

[The Calculus of War @calculusofwar]

Every plane they studied had survived. The holes marked where a bomber CAN take a hit.

The fatal damage was on the planes that never returned — the data they couldn't see.

So they armored the clean spots. It's called survivorship bias.

[The Calculus of War @calculusofwar]

The Army wanted to armor the bullet holes on returning bombers.

A mathematician told them to armor everywhere else.

He was right — and thousands of pilots came home because of it. 🧵🖊️

[The Calculus of War @calculusofwar]

The Allied intelligence guess was 1,400/month — off by nearly 6x.

What should we cover next? 👇

[The Calculus of War @calculusofwar]

The Allies had spies across all of Europe.

A mathematician with a pencil beat every single one of them.

How they counted Germany's tanks using nothing but serial numbers 🧵🖊️