WHAT HAPPENED ON 11. AUGUST
Want to find out what all happened on 11. August

The Mesoamerican Long Count calendar, used by several pre-Columbian Mesoamerican civilizations, notably the Mayans, begins. (11. August 3114. BC)

Traditional date of the defeat of Bel by Hayk, progenitor and founder of the Armenian nation. (11. August 2492. BC)

The south-western part of Dacia (modern Romania) becomes a Roman province: Roman Dacia. (11. August 106)

Claudius Silvanus, accused of treason, proclaims himself Roman Emperor against Constantius II. (11. August 355)

Battle of Adda: The Goths under Theodoric the Great and his ally Alaric II defeat the forces of Odoacer on the Adda River, near Milan. (11. August 490)

Wars of Scottish Independence: Battle of Dupplin Moor – Scots under Domhnall II, Earl of Mar are routed by Edward Balliol. (11. August 1332)

The Battle of Otlukbeli: Mehmed the Conqueror of the Ottoman Empire decisively defeats Uzun Hassan of Aq Qoyunlu. (11. August 1473)

Franco-Dutch War: forces of the Holy Roman Empire defeat the French in the Battle of Konzer Brücke. (11. August 1675)

Captain Francis Light establishes the British colony of Penang in Malaysia. (11. August 1786)

Francis II assumes the title of first Emperor of Austria. (11. August 1804)

Peninsular War: French troops engage British-Portuguese forces in the Battle of Majadahonda. (11. August 1812)

The Eiger in the Bernese Alps is ascended for the first time by Charles Barrington accompanied by Christian Almer and Peter Bohren. (11. August 1858)

Spanish–American War: American troops enter the city of Mayagüez, Puerto Rico. (11. August 1898)

World War I: the Battle of Amiens ends. (11. August 1918)

The constitution of the Weimar Republic is adopted. (11. August 1919)

The Latvian–Soviet Peace Treaty, which relinquished Russia's authority and pretenses to Latvia, is signed, ending the Latvian War of Independence. (11. August 1920)

Babe Ruth becomes the first baseball player to hit 500 home runs in his career with a home run at League Park in Cleveland, Ohio. (11. August 1929)

The first civilian prisoners arrive at the Federal prison on Alcatraz Island. (11. August 1934)

Actress Hedy Lamarr and composer George Antheil receive a patent for a Frequency-hopping spread spectrum communication system that later became the basis for modern technologies in wireless telephones and Wi-Fi. (11. August 1942)

Poles in Kraków engage in a pogrom against Jews in the city, killing 1 and wounding 5. (11. August 1945)