| Event | Year | Episode |
|---|---|---|
| Avatar Kuruk tries to kill Koh, the Face Stealer. | c. -900 | The Siege of the North, Part 2 |
| Avatar Kyoshi born. | c. -400 | The Warriors of Kyoshi |
| Avatar Kyoshi kills General Chin and creates Kyoshi island. | c. -370 | Avatar Day |
| Fire Lord Sozin born. | c. -182 | no episode |
| Avatar Kyoshi dies. | c. -170 | Avatar Escape Online Comic - Kyoshi |
| Aang born. | c. -112 | The Boy in the Iceberg |
| Avatar Roku dies. | c. -112 | The Spirit World (Winter Solstice, Part 1) |
| Aang runs away and gets frozen in an iceberg with Appa. | c. -100 | The Boy in the Iceberg |
| Birth of Fire Lord Azulon. | c. -100 | no episode |
| Coming of Sozin's comet, Fire Lord Sozin launches attack on Air Temples, war of conquest begins. | c. -100 | Avatar Roku (Winter Solstice, Part 2) |
| Conflict between Zhang and Gan Jin begins. | c. -100 | The Great Divide |
| Northern Water Tribe city fights Fire Nation soldiers and gets uniforms. | c. -85 | The Siege of the North, Part 1 |
| Kana (Gran-Gran) born. | c. -80 | no episode |
| Kana leaves North Pole and goes to South Pole. | c. -60 | The Waterbending Master |
| The Herbalist arrives at the Herbalist Institute in the Earth Kingdom. | c. -40 | The Blue Spirit |
| Death of Fire Lord Sozin, succession of Fire Lord Azulon. | c. -30 | Zuko Alone |
| Aunt Wu arrives at her village in the Earth Kingdom. | c. -20 | The Fortuneteller |
| Prince Zuko born. | c. -16 | Avatar Roku (Winter Solstice, Part 2) |
| Princess Yue born. | c. -16 | The Siege of the North, Part 2 |
| Mai born. | c. -15 | no episode |
| Sokka was born. | c. -15 | no episode |
| Katara born. | c. -14 | no episode |
| Princess Azula born. | c. -14 | no episode |
| Toph Beifong born. | c. -12 | The Blind Bandit |
| Beginning of the 600 day Siege of Ba-Sing-Se. | c. -7 | Zuko Alone |
| End of 600 day siege of Ba-Sing-Se, death of Iroh's son, Lu Ten. | c. -6 | Zuko Alone |
| Death of Fire Lord Azulon, succession of Fire Lord Ozai. | c. -5 | Zuko Alone |
| Haru's village occupied by the Fire Nation. | c. -5 | Imprisoned |
| Prince Zuko banished after dueling his father. | c. -3 | The Avatar State |
| Katara and Sokka's father depart from their village to help the Earth Kingdom. | c. -2 | The Boy in the Iceberg |
| A young Lieutenant Zhao serving under General Shu in the Earth Kingdom discovers the Moon Spirit scroll. | c. ? | The Siege of the North, Part 2 |
| Aang released by Katara from the iceberg. | c. ? | The Boy in the Iceberg |
| Fire Nation first attacks on Southern Water Tribe (resulting in derelict Fire Navy ship near Kana's village). | c. ? | The Boy in the Iceberg |
| Founding of the City of Omashu. | c. ? | The Cave of Two Lovers |
| Jeong Jeong leaves the Fire Nation military. | c. ? | The Deserter |
| Jet's parent killed by Fire Nation when he was 8 years old. | c. ? | Jet |
| Katara and Sokka's mother killed in a Fire Nation raid. | c. ? | The Boy in the Iceberg |
| Re-occupation of the Northern Air Temple by the Mechanist and his people. | c. ? | The Northern Air Temple |
| Song's father taken away in Fire Nation raid when Song was a little girl. | c. ? | The Cave of Two Lovers |
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