Despite overwhelming Persian successes spanning almost two decades of war, from 622 Heraclius led a fresh counter-offensive in the Transcaucasus which brought about a remarkable revival of Byzantine fortunes. By 624, Heraclius wintered in Caucasian Albania, gathering forces for the next year. Khosrau was not content to let Heraclius quietly rest in Albania. He sent three armies, commanded by Shahin, Shahrbaraz, and Shahraplakan, to try to trap and destroy Heraclius' forces. Shahraplakan retook lands up as far as Siwnik, aiming to capture the mountain passes. Shahrbaraz was sent to block Heraclius' retreat through Caucasian Iberia, and Shahin was sent to block the Bitlis Pass. Heraclius, planning to engage the Persian armies separately, spoke to his worried Lazic, Abasgian, and Iberian allies and soldiers, saying: "Do not let the number of our enemies disturb us. For, God willing, one will pursue ten thousand."