1419
First Defenestration of Prague
Hussite radicals stormed the New Town hall, seized seven Catholic councillors, and threw them from the upper windows onto the pikes of the crowd below. The signal was unmistakable: Bohemia would not submit. Sigismund's crusade against the heretics would fail for fifteen years, stopped by wagon-forts and peasant hymns. Defenestration became a Bohemian tradition of regime change, repeated in 1618 to ignite the Thirty Years' War.
Ulugh Beg Governs Samarkand
Timur's astronomer grandson took permanent charge of Samarkand at age fifteen and immediately began transforming the city into the intellectual capital of the Islamic world. He would build madrasas on the Registan square, attract mathematicians from Persia, Syria, and Anatolia, and personally calculate star positions with a forty-meter sextant whose precision would not be surpassed until Tycho Brahe worked in Denmark a century and a half later.
Cao Bang Rebellion Against Ming Occupation
In the pine-covered hills above the Red River, Le Loi gathered a band of outlaws and began raiding Chinese garrisons. The Ming commander dismissed him as a bandit. Within a decade Le Loi would be emperor of an independent Vietnam and a national hero schoolchildren still salute. Le Loi's guerrilla tactics became the template for Vietnamese resistance warfare replicated against invaders for six centuries.
Madeira Rediscovered by Portuguese
Portuguese caravels under Joao Goncalves Zarco landed on the uninhabited Atlantic island of Madeira, already known but forgotten. The islands were cleared by burning, sugarcane was planted, and African slaves imported to work it. The Atlantic sugar-slave complex that would define four centuries of colonial economics was tested there first.