Blog

Posts, updates, and occasional notes that sit alongside The Butterfly Effect.

Taking of Jerusalem by the Crusaders, 15 July 1099, painting by Émile Signol

Blood to the Bridle Reins

Jul 15, 2026By Andy Barca

On 15 July 1099, Crusaders broke into Jerusalem after a five-week siege and three years of marching. Raymond of Aguilers described men riding through the Temple Mount in blood up to their horses' bridles.

The Storming of the Bastille, 14 July 1789, anonymous painting

The Prison Nobody Needed to Storm

Jul 14, 2026By Andy Barca

On 14 July 1789, Parisians stormed the Bastille after four hours of fighting that killed 98 attackers and one defender. Inside, they found seven prisoners in a fortress the state had already scheduled for demolition.

Portrait of King Mindaugas of Lithuania, from Guagnini’s chronicle, 1611

The Ransom They Wouldn't Pay

Jul 13, 2026By Andy Barca

On 13 July 1260, the Livonian Order marched roughly 8,000 men and 190 knights to Lake Durbe to punish a Samogitian raid. It lost its own master, its Prussian marshal, and 150 knights in an afternoon, after its own allies walked off the field over a prisoner dispute.

Portrait of Fray Diego de Landa

The Friar Who Burned the Library and Kept the Key

Jul 12, 2026By Andy Barca

On 12 July 1562, Fray Diego de Landa burned thousands of Maya idols and 27 painted codices at Maní. Only four Maya books survive anywhere today. The man who destroyed them later wrote the one document that let scholars start reading what was left.

Rollo, Duke of Normandy, from a 13th-century roll of the Norman dukes

Not So Simple After All

Jul 11, 2026By Andy Barca

In the autumn of 911, Charles the Simple gave the Viking warlord Rollo a stretch of land around Rouen he could not defend anyway. No copy of the deal survives, and the best account of it was written a century later by a chronicler paid to flatter Rollo's descendants. Out of that shaky record came Normandy, and eventually England's ruling class.

The Streatham portrait of Lady Jane Grey, 1590s

Nine Days and a Scaffold

Jul 10, 2026By Andy Barca

On 10 July 1553, Lady Jane Grey was proclaimed Queen of England. She was sixteen, Protestant, and a pawn in a plot to keep Mary Tudor off the throne. Nine days later the Privy Council abandoned her. Within a year she was dead.

Portrait of Catherine II of Russia by Fyodor Rokotov, after Alexander Roslin, 1780s

The Uniform She Borrowed

Jul 9, 2026By Andy Barca

On 9 July 1762, Catherine rode into St Petersburg in a borrowed Guards uniform, won over three regiments in a morning, and forced her husband, Peter III, to sign away the Russian throne by nightfall. He was dead within eight days; she reigned for the next thirty-four years.

Battle of Poltava, 1709, painting by Pierre-Denis Martin, 1726

The Chair on the Battlefield

Jul 8, 2026By Andy Barca

On 8 July 1709, Peter the Great crushed Charles XII's Swedish army at Poltava. Charles fought from a litter with a bullet wound in his foot. Nine years of Swedish invincibility ended in an afternoon, and Russia stepped into the space it left behind.

Portrait of Tsar Alexander I of Russia by George Dawe, c. 1818–1825

Two Emperors on a Raft

Jul 7, 2026By Andy Barca

On 7 July 1807, France and Russia signed the Treaty of Tilsit after a staged reconciliation on a raft in the Neman. Prussia was carved in half two days later. The alliance it built was the high point of Napoleon's power and the start of its unravelling.

AK-47 assault rifle, Soviet 7.62mm design

The Day That Wasn't

Jul 6, 2026By Andy Barca

Popular history says the AK-47 went into production on 6 July 1947. Soviet trial records say the rifle didn't exist yet that week, and had just failed its tests. What emerged from the redesign armed a hundred million people anyway.