The tribes of Judah, Benjamin and Simeon alone remained attached to the house of David. The two last named, however, had no separate existence, they were merged into the tribe of Judah. The house of Israel, which had been joined with the house of Judah for barely a century, was thus again divided from it. To avoid continual warfare as well as the necessity of being constantly on the defensive, each of the two kings sought to strengthen himself by alliances, and thus frustrate all hostile plans. Rehoboam made a treaty with the newly elected king of Damascus, the state founded by Rezon, the bandit, in Solomon's time, having attained great power. Rezon, or his successor Tabrimon, had united various Aramæan districts to Damascus, and ruled over extensive territory. The treaty between Rehoboam and the king of Damascus prevented Jeroboam from attacking the kingdom of Judah, and visiting it with the horrors of a long war. Jeroboam, on the other hand, formed an alliance with another power, in order to exasperate and alarm the king of Judah. A union of the two kingdoms was distasteful to both. The difference in their history prevented their coalescing. The house of Israel, especially the tribe of Ephraim, willingly relinquished the advantages which might accrue from a union with the house of David, in order that it might not be forced to assume an inferior position. The more worthy in both kingdoms were probably filled with grief at the breach which had occurred, but they were unable to avert it. The civil war which appeared imminent was prevented by the prophet Shemaiah, who, in the name of God, called on the Judæans and Benjamites to desist from fratricide. Slight feuds, however, broke out between the contiguous kingdoms, as was unavoidable between such near neighbours, but they led to no serious result.