Daniel 11:5

The king described in this verse proved to be Ptolemy I Soter (323-285 B.C.), one of Alexander’s most powerful generals, who proclaimed himself king of Egypt in 304 B.C. He was an ambitious monarch who sought to extend his holdings north into Cyprus, Asia Minor, and Greece. His dynasty ruled Egypt until 30 B.C.

The "prince" under the king of the South, who would gain ascendancy over the king of the South, was Seleucus I Nicator (312-281 B.C.), another of Alexander’s most prominent generals. He had gained authority to rule Babylon in 321 B.C. However, in 316 B.C., another of Alexander’s generals, Antigonus, attacked Babylon. Seleucus sought help from Ptolemy I, and with Ptolemy’s sponsorship and superior power was able to retain control of Babylon. He was in this sense Ptolemy’s prince; he submitted to him to gain his military support against Antigonus. Seleucus I eventually ruled all of Babylonia, Media, and Syria, a territory much larger than Ptolemy’s. He assumed the title "king" in 305 B.C., and was "the king of the North" referred to in this verse. His dynasty lasted until 64 B.C.