Historical Events on October 20

28 significant historical events occurred on October 20. October 20 has been notable for various military and diplomatic events. On this date, the Battle of Ulm in 1805 took place during the Napoleonic Wars, and the naval Battle of Navarino occurred in 1827 during the Greek War of Independence. Important treaties were also signed, such as the 1818 agreement between Britain and the United States and the 1921 Treaty of Ankara between Turkey and France. In a different context, October 20, 1972, marks the adoption of Pakistan's Constitution, establishing the supreme law of the Islamic Republic.