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What was the Syro-Ephraimitic War?

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The prophet Isaiah — Isaiah Miniature of Isaiah, manuscript illumination from *The Siegburg Lectionary*, 12th century.

The Syro-Ephraimitic War (734–732 BCE) was a military conflict in which the northern kingdom of Israel, led by King Pekah, and the kingdom of Syria, led by King Rezin, formed an alliance to invade the kingdom of Judah.12

The primary objective of this coalition was to force Ahaz, the king of Judah, to join them in an alliance against the expanding power of Assyria. During this crisis, the prophet Isaiah advised King Ahaz to place his trust in Yahweh rather than seeking foreign intervention. However, Ahaz rejected this counsel and instead appealed for aid from the Assyrian king Tiglath-pileser III.12

Assyria subsequently defeated Syria and Israel, effectively ending the threat to Judah. However, this decision had severe long-term consequences: Judah became an Assyrian vassal, was forced to pay heavy tribute, and saw the introduction of Assyrian religious practices into the Temple at Jerusalem.1