A dramatic shift in power marks the sudden collapse of the mighty Babylonian empire and the dawn of a new world power. An older, foreign leader assumes the throne. This ruler is Darius the Mede. Commentators distinguish him from the later Persian king named Darius, who is known from the era of the Second Temple. This Darius was the father-in-law of Cyrus, the king of Persia. Together, the two leaders allied to conquer Babylon and forge the joint empire of Media and Persia. Following their victory, Cyrus appointed his father-in-law to govern the Chaldean realm [אבן עזרא, ביאור שטיינזלץ].
The transition of leadership was notably peaceful. Rather than seizing the throne through violent conquest, Darius assumed control through a willing transfer of power. Following the abrupt downfall of the Babylonian king Belshazzar, the Chaldean military forces and government ministers recognized that their era had ended. Instead of fighting a doomed battle, they surrendered and willingly accepted the authority of Darius [מלבי״ם, אלשיך].
The specific age of the new king—sixty-two years old—carries profound historical and spiritual significance. This number corresponds exactly to the number of years that had passed since the exile of Jeconiah. On the very day that the Babylonian king Nebuchadnezzar first entered the sanctuary in Jerusalem, Darius was born. Through this exact timing, God's providence is revealed: He was already preparing the downfall of Babylon on the exact day it began to destroy Jerusalem [רש״י, מלבי״ם, אלשיך].
On a practical level, the king's advanced age also explains the administrative decisions he would soon make. Darius found himself in a highly vulnerable position. He was a foreigner, an elderly man, and a ruler who had taken power through mutual agreement rather than military dominance. These three factors left him feeling insecure and deeply anxious about a potential rebellion. Knowing he lacked the strength to rule through fear or to manage such a vast empire entirely on his own, he urgently needed to restructure the government. To ensure the stability of his new reign, he would have to appoint officials to share the heavy burden of leadership [מלבי״ם, אלשיך].