الكرك
The following year the Muslims launched an offensive into the Arabah south of Lake Tiberias, taking Al Karak. Other raids penetrated into the Negev, reaching as far as Gaza. The Battle of Yarmouk in 636 resulted in a crushing defeat for the larger Byzantine army; within three years, the Levant had been lost again. Heraclius died of an illness on 11 February 641; and most of Egypt had fallen by that time as well.