Battle of the Mander

A battle occurred at the mouth of the Mander between House Greyjoy and House Tyrell in the final days of Robert's Rebellion.

Prelude
After the Battle of the Trident, Balon and Euron Greyjoy convinced their old father Quellon Greyjoy to join Robert's Rebellion and attack the Reach.

Battle
The Greyjoy fleet unexpectedly met Tyrell longboats at the mouth of the river Mander. Lord Quellon died in the fighting, making his son Balon the new Lord of the Iron Islands. Balon ordered a tactical retreat, and thus the Greyjoy participation in Robert's Rebellion ended.

Aftermath
After his defeat, Balon returned to the Iron Islands to sit the Seastone Chair. Against his brother Euron's advice, Balon declared war on the Iron Throne yet again.

In the books
In The World of Ice & Fire, Quellon Greyjoy led fifty longships against the Reach. At the mouth of the Mander, they were surprised by the longboats of the Shield Islands. The ironborn won the battle, but Balon retreated back to Pyke nonetheless.