Battle of Winterfell (Great War)

The Great Battle of Winterfell is a major battle that takes place during the Great War between an alliance of living armies versus the Army of the Dead led by the White Walkers. The battle takes place at Winterfell, the seat of House Stark and capital of the North.

It will be depicted in Season 8.

Prelude
Jon Snow, King in the North, prepared the North for the White Walkers, who rose again after thousands of years during his time in the Night's Watch. He negotiated with Daenerys Targaryen during her invasion of Westeros, eventually cultivating an ally in her. After Cersei Lannister, who held the Iron Throne after the War of the Five Kings, agreed to a parley in King's Landing, Jon ventured beyond the Wall with a team to capture a wight, which nearly failed until Daenerys rescued Jon and the survivors, though at the cost of one of her dragons, Viserion, who died at the hands of the Night King. The wight was presented by Jon, Daenerys, and their followers at a parley at the Dragonpit before Cersei, Euron Greyjoy, and their entourage. While Euron declared he would retreat to the Iron Islands, Cersei agreed to a truce, and later further agreed to send her armies north to assist in the Great War after negotiating with her brother Tyrion, the Hand to Daenerys.

After Jon and Daenerys began sailing back to the North following the parley, Cersei Lannister revealed to her brother Jaime that she and Euron Greyjoy plotted to betray the truce that they agreed to, and that Euron was ferrying the Golden Company from Essos to Westeros on the Iron Fleet in order to help the Lannisters reconquer the Seven Kingdoms. Seeking to uphold the vow he made at the parley, Jaime abandoned his sister in King's Landing and rode north alone to help in the Great War against the White Walkers and the Army of the Dead.

Meanwhile, the Night King breached the Wall with a reanimated Viserion, nullifying its magic and allowing the White Walkers and the Army of the Dead to cross into the realms of men, heading first towards the North.

The battle
The battle will be depicted in Season 8.

Aftermath
The aftermath of the battle will be depicted in Season 8.

In the books
In the A Song of Ice and Fire novels by George R.R. Martin, an equivalent battle has not occurred. The TV show has surpassed the timeline of the books, so it is unclear if an equivalent battle will occur or not.