The following year, the Arabs 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.
the following year the arabs 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