Completed the following sentence: Antwerp was one of the richest cities in northern Europe and a rebel stronghold ever since Spanish and Walloon troops sacked it in 1576. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ The Dutch sailed fireships, called Hellburners, against the bridge and one of the exploding infernal machines blew up a 200-foot-long span and killed 800 Spaniards.<unk> ️<unk>️<unk>️<unk>️
️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Brussels, Mechelen and Geertruidenberg fell the same year.