Retaking of the Iron Islands

The Retaking of the Iron Islands was a succesful attempt by the faction of House Greyjoy loyal to Yara Greyjoy and allied with House Targaryen to take back their home while Euron's Iron Fleet was preoccupied at King's Landing.

Prelude
Following her rescue at  her brother's hands, Yara decided to use the few ships and men still at her command to take the Iron Islands back from her treacherous uncle. Meanwhile, Theon took a small portion of this force north to fight and ultimately die for The Living at the Battle of Ice and Fire.

The Battle
According to the reports of Varys, the reconquest was succesful. Considering the bulk of Euron's fleet was occupied serving Cersei on the other side of the continent, Yara's men likely encountered little resistance.