Escape. Don Juan and John Johnson escape the harem in company of two women. Consequent to fleeing the palace of the Sultan of Constantinople, the four reach the Danube river during the Russian Siege of Izmail (1789–1790), a Turkish fort at the mouth of the river, on the Black Sea. The Imperial Russian Field Marshal Alexander Suvorov is preparing the final assault against the fortress at Izmail. As the battle for the fort rages, Prince Grigory Potemkin, the Russian commander-in-chief, orders Marshal Suvorov to "take Ismail at whatever price", for the greater glory of Catherine II, the Christian great empress of Russia. In the event, John Johnson presents himself to Suvorov (with whom he fought in battle at Widdin, in Bulgaria) and introduces his friend Don Juan, saying that both men are ready to join the Christian fight against the pagan Turks. Marshal Suvorov is very unhappy that John and Juan have appeared at the Siege of Izmail, in company of two women who claim to be the wives of soldiers. To assuage Suvorov to consent to the women remaining with them, Juan and John tell him that the women aided their escape from the Turks.