Terra Tempus Daily #81 — August 20, 2026

Round 1

Berne Convention for the Protection of Literary and Artistic Works

Berne Convention for the Protection of Literary and Artistic Works · 1880 · 19th Century

Why there: Berne, the capital of neutral, centrally located Switzerland, was a natural diplomatic meeting ground where competing European powers could negotiate a multilateral treaty without any single nation dominating.

Why then: ,

• The Berne Convention for the Protection of Literary and Artistic Works was adopted in Berne, Switzerland, in 1886.
• It was driven by Victor Hugo's Association Litteraire et Artistique Internationale and established that copyright is automatic upon creation, with no registration required.
• Today over 180 countries are parties to the treaty, administered by WIPO.

Round 2

Withheld from the archive

This round was played, but we do not republish it here. Recent events involving mass civilian casualties are excluded from our public archive under our content policy, whatever their place in the day’s puzzle.

Round 3

Battle of Kolín

Battle of Kolín · 1757 · Early Modern

Why there: Kolín sat on the road east of Prague along the Elbe, so an Austrian relief army moving to break Frederick's siege of the Bohemian capital had to be intercepted there, on the rolling ridges that let the Austrians entrench uphill on strong defensive ground.

Why then: The Seven Years' War had erupted in 1756 as Austria sought to reclaim Silesia lost to Prussia, and mid-18th-century warfare of linear infantry, massed artillery, and siege-based campaigns meant Frederick's aggressive uphill assault could be decisively broken by disciplined entrenched defenders.

• This 1757 battle saw Frederick the Great defeated by Austrian Field Marshal Daun during the Seven Years' War.
• The loss forced Frederick to lift his siege of Prague and withdraw from Bohemia.
• Empress Maria Theresa founded her highest military order on the very day of the battle, 18 June 1757.

Round 4

Attack on Pearl Harbor

Attack on Pearl Harbor · 1941 · 20th Century

Why there: Pearl Harbor in Hawaii was the forward-deployed home of the U.S. Pacific Fleet, whose battleships and carriers were the only force capable of blocking Japanese expansion across the Pacific, making the harbor the decisive target.

Why then: By 1941 U.S. oil embargoes threatened to strangle Japan's war economy, while newly matured carrier aviation gave Japan the long-range striking power to attempt a knockout blow before America could rearm.

• This was the attack on Pearl Harbor, Hawaii, on 7 December 1941.
• Imperial Japan's strike brought the United States into the Second World War.
• President Franklin D. Roosevelt called it 'a date which will live in infamy.'

Round 5

Battle of Dorylaeum

Battle of Dorylaeum · 1097 · Medieval

Why there: Dorylaeum sat on the main overland road across the arid Anatolian plateau, the only viable route the crusaders could take toward Syria, and thus the natural place for the Seljuk Turks who controlled that interior to intercept them.

Why then: The First Crusade came in 1097 because Pope Urban II's 1095 call mobilized Western knights just as the Seljuks' recent seizure of Anatolia and a fracturing Byzantine frontier drew the armies eastward through Turkish-held land.

• This First Crusade victory was over the Seljuk Turks under Kilij Arslan.
• The crusader vanguard under Bohemond of Taranto dismounted and held out until reinforcements arrived to break the Turkish encirclement.
• It was fought near a town in western Anatolia, close to a modern Turkish city.