Historical Events on October 20

Battle of Ulm — 1805 battle during the War of the Third Coalition

Treaty of 1818 — formal, binding written agreement entered into by the United Kingdom and the United States in international law

Battle of Navarino — 1827 naval battle during the Greek War of Independence

Treaty of Ankara — Treaty between the Grand National Assembly of Turkey and France

Constitution of Pakistan — supreme law of the Islamic Republic of Pakistan

1991 Japanese Grand Prix — Formula One motor race held in 1991