Portal:War/Selected anniversaries/October 1
- 331 BC – Alexander the Great defeats Darius III of Persia in the Battle of Gaugamela.
- 1189 – Gerard de Ridefort, grandmaster of the Templars since 1184 is killed in the Siege of Acre.
- 1827 – The Russian army under Ivan Paskevich storms Yerevan, ending a millennium of Muslim domination in Armenia.
- 1943 – World War II: Naples falls to Allied soldiers.