(1) In his days.—In his fifth or sixth year. In Jehoiakim’s fourth year Nebuchadnezzar defeated Necho at Carchemish (Jeremiah 46:2), and was suddenly called home by the news of the death of Nabopolassar his father, whom he succeeded on the throne of Babylon in the same year (Jeremiah 25:1). From Jeremiah 36:9 we learn that towards the end of Jehoiakim’s fifth year the king of Babylon was expected to invade the land. When this took place, Nebuchadnezzar humbled Jehoiakim, who had probably made his submission, by putting him in chains, and carrying off some of the Temple treasures (2Chronicles 36:6-7). Left in the possession of his throne as a vassal of Babylon, Jehoiakim paid tribute three years, and then tried to throw off the yoke.

Nebuchadnezzar - or Nebuchadrezzar, which is closer to the original, Nabu-kudurri-uzur. This name, like most Babylonian names, is made up of three elements, Nebo, the well-known god Isaiah 46:1, kudur, of doubtful signification (perhaps "crown" perhaps "landmark"), and uzur "protects." Nebuchadnezzar, the son of Nabopolassar, and second monarch of the Babylonian empire, ascended the throne, 604 B.C., and reigned 43 years, dying 561 B.C. He married Amuhia (or Amyitis), daughter of Cyaxares, king of the Medes, and was the most celebrated of all the Babylonian sovereigns. No other pagan king occupies so much space in Scripture. He was not actual king at this time, but only Crown Prince and leader of the army under his father. As he would be surrounded with all the state and magnficence of a monarch, the Jews would naturally look upon him as actual king.

Came up - Nebuchadnezzar began his campaign by attacking and defeating Neco's Egyptians at Carchemish Jeremiah 46:2. He then pressed forward toward the south, overran Syria, Phoenicia, and Judaea, took Jerusalem, and carried off a portion of the inhabitants as prisoners Daniel 1:1-4 : after which he proceeded southward, and had reached the borders of Egypt when he was suddenly recalled to Babylon by the death of his father.

Three years - Probably from 605 B.C. to 602 B.C. Jehoiakim rebelled because he knew Nebuchadnezzar to be engaged in important wars in some other part of Asia.

2Ki 24:1-7. Jehoiakim Procures His Own Ruin.

1, 2. Nebuchadnezzar—the son of Nabopolassar, the founder of the Chaldee monarchy. This invasion took place in the fourth year of Jehoiakim's, and the first of Nebuchadnezzar's reign (Jer 25:1; compare Jer 46:2). The young king of Assyria being probably detained at home on account of his father's demise, despatched, along with the Chaldean troops on his border, an army composed of the tributary nations that were contiguous to Judea, to chastise Jehoiakim's revolt from his yoke. But this hostile band was only an instrument in executing the divine judgment (2Ki 24:2) denounced by the prophets against Judah for the sins of the people; and hence, though marching by the orders of the Assyrian monarch, they are described as sent by the Lord (2Ki 24:3).Jehoiakim, first subdued by Nebuchadnezzar, rebelleth against him to his own ruin: Jehoiachin his son is king in his stead, 2 Kings 24:1-6. His evil reign: Jerusalem spoiled and made captive by the king of Babylon, 2 Kings 24:8-16. He maketh Zedekiah king: he reigneth ill, unto the utter destruction of Judah, 2 Kings 24:17-20.

In his days, i.e. in Jehoiakim’s reign, in the end of his third year, Daniel 1:1, or the beginning of his fourth, Jeremiah 25:1, Nebuchadnezzar; the son of Nabopolassar, who quite subdued the Assyrian, first his lord, and then his competitor, and made himself absolute monarch of all those parts of the world. Came up, to wit, against Jehoiakim, as the friend and confederate of Pharaoh, whose forces he had lately conquered, Jeremiah 46:2. He turned and rebelled against him, by the instigation of the Egyptian, who threatened him if he did not rebel, and promised him his utmost assistance if he did.

and Jehoiakim became his servant three years: which were the fifth, sixth, and seventh years of his reign:

then he turned and rebelled against him; being encouraged by the king of Egypt, who promised to assist him against the king of Babylon; Nebuchadnezzar is the Nabocolasser in Ptolemy's canon; and Berosus (n) testifies, that seventy years before the Persian monarchy he made war against the Phoenicians and Jews, and it is from this time the seventy years' captivity is to be dated.

(n) Apud Clement. Alex. Stromat. 1. p. 329.

(a) In the end of the third year of his reign and in the beginning of the fourth, Dan 1:1.