Battle of Mansurah traps the Seventh Crusade

February 8, 1250

Louis IX's vanguard, under his hotheaded brother Robert of Artois, charged into the streets of Mansurah and was annihilated by Mamluk counterattacks. The campaign stalled in the muddy Delta; dysentery and Greek fire finished what Mamluk arrows had begun. Robert of Artois died in the streets, his reckless charge having destroyed the crusade's best troops and its last chance of reaching Cairo.