Accession to the throne
Conventional biblical chronology dates the start of Rehoboam's reign to the mid-10th century BC. His reign is described in 1 Kings 12 and 1 Kings 14:21–31 and in 2 Chronicles in the Hebrew Bible. Rehoboam was 41 years old (16 in Chapter 12 of 3 Kings in the Septuagint) when he ascended the throne.
The ten northern tribes assembled at Shechem to proclaim Rehoboam King of Israel. At the assembly, the tribes requested certain reforms in the policy followed by Rehoboam's father, Solomon. The reforms requested would materially reduce the royal exchequer and hence its power to continue the magnificence of Solomon's court. The older men counselled Rehoboam at least to speak to the people in a civil manner (it is not clear whether they counselled him to accept the demands). However, the new king sought the advice from the young men with which he had grown up, who advised the king to show no weakness to the people, and to tax them even more, which Rehoboam did.
Although the ostensible reason was the heavy burden laid upon Israel because of Solomon's great outlay for buildings and for luxury of all kinds, the other reasons include the historical opposition between the north and the south. The two sections had acted independently until David, by his victories, succeeded in uniting all the tribes, though the Ephraimitic jealousy was ever ready to develop into open revolt. Religious considerations were also operative. The building of the Temple was a severe blow for the various sanctuaries scattered through the land, and the priests of the high places probably supported the revolt. Josephus (Ant., VIII., viii. 3) has the rebels exclaim: "We leave to Rehoboam the Temple his father built."
Jeroboam and the people rebelled, with the ten northern tribes breaking away and forming a separate kingdom. The new breakaway kingdom continued to be called Kingdom of Israel and was also known as Samaria, or Ephraim or the northern kingdom. The realm Rehoboam was left with was called Kingdom of Judah.
During Rehoboam's 17-year reign, he retained Jerusalem as Judah's capital but
Judah did what was evil in the sight of the Lord, and they provoked him to jealousy with their sins which they committed, more than all that their fathers had done. For they also built for themselves high places and pillars, and Ashe′rim on every high hill and under every green tree, and there were also male cult prostitutes in the land. They did according to all the abominations of the nations which the Lord drove out before the people of Israel.