In J. R. R. Tolkien's fictional Middle-earth, the Dagor Bragollach (Sindarin for Battle of Sudden Flame) was the fourth battle of the Wars of Beleriand. It was the great turning point in the War of the Jewels.
Read more about Dagor Bragollach: Battle of Sudden Flame, Initial Phase, 455, First Age, Battle of Sudden Flame, Middle Phase 456, First Age, Battle of Sudden Flame, Later Phase 456 - 466 First Age, Battle of Sudden Flame, Aftermath, 467, First Age, Influence in Popular Culture