Sword Art Online: Alicization - War of Underworld Episode 6: Battle of the Knights
Episode 6 of 12 of Sword Art Online: Alicization - War of Underworld, aired November 16, 2019, 25 minutes. Available with English subtitles and dub where released.
Episode summary
The Final Load Test has begun, and the Eastern Gate has collapsed. Incited by Gabriel, now Emperor Vecta, the massive army of the land of darkness pushes on towards the Human Empire.