ATLA Book 4 - The Cold War

Post-Canon Continuation of Avatar: The Last Airbender
(Disregarding the comics and sequel series)

Two years have passed since Avatar Aang defeated Fire Lord Ozai.
To restore peace across the world, Team Avatar was forced to do the one thing none of them wanted:

Separate.

Aang remained in the Fire Nation capital, helping Fire Lord Zuko rebuild trust within a nation still struggling to let go of a century of war. As the Avatar, he became both Zuko's strongest ally and the world's most visible symbol of peace.

Katara stayed in the colonies, traveling alongside a growing network of healers, she moves from conflict to conflict, treating the wounded and protecting civilians caught between revenge-driven resistance groups and Fire Nation extremists unwilling to accept the war's end.

Sokka spends his time crossing borders, gathering intelligence, negotiating disputes and solving problems nobody else sees coming. Recently, he has begun noticing patterns hidden beneath the growing unrest.

Toph divides her time between the Earth Kingdom and the Fire Nation, using the influence of the Beifong family to expose corruption, challenge political leaders and ensure old war ideologies do not find their way back into power.

Though separated by oceans, politics and responsibility, Team Avatar stays connected through messenger routes and letters.

Sometimes those letters arrive.

Sometimes they don't.

The war is over, but the fight for peace has only just begun...