The fourth year of the reign of Jehoiakim (625 B.C.E.) saw Nebuchadnezzar defeat Pharaoh Necho in a battle over the domination of Syria-Palestine. The battle took place at Carchemish by the Euphrates, over 600 km (370 mi) N of Jerusalem. (Jer 46:1, 2)

It was not until Jehoiakim’s fourth year of rule over Judah that Nebuchadnezzar demolished Egyptian domination over Syria-Palestine by his victory at Carchemish (625 B.C.E. [apparently after Nisan]). (Jer 46:2)