events
December 31, 1501
The First Battle of Cannanore commences, seeing the first use of the naval line of battle.[citation needed]
![The First Battle of Cannanore commences, seeing the first use of the naval line of battle.[citation needed]](https://upload.wikimedia.org/wikipedia/commons/thumb/1/19/Batalha_de_Cananor_%E2%80%93_Hist%C3%B3ria_de_Portugal%2C_Popular_e_Ilustrada.jpg/330px-Batalha_de_Cananor_%E2%80%93_Hist%C3%B3ria_de_Portugal%2C_Popular_e_Ilustrada.jpg)
First Battle of Cannanore
The First Battle of Cannanore was a naval engagement between the Third Portuguese Armada under João da Nova and the naval forces of Calicut, which had been assembled by the Zamorin against the Portuguese in order to prevent their return to Portugal.
Line of battle
The line of battle or the battle line is a tactic in naval warfare in which a fleet of ships forms a line end to end. The first example of its use as a tactic is disputed—it has been variously claimed for dates ranging from 1502 to 1652. Line-of-battle tactics were in widespread use by 1675.