Ahaz had at the age of twenty or twenty-five assumed the throne of Judah.

Sometime later Pekah, king of Israel, and Rezin, king of Syria, had invaded his kingdom in an effort to force him into an alliance with them against Assyria, sparking the Syro-Ephraimite War.

Ahaz had appealed to Tiglath-Pileser to repel the invaders.

The Judahite prophet Isaiah from 736 to 735 turns from internal political and economic policy to address the crisis caused by the war.

Ashdod may possibly have fallen in the eighth century to Judah (2 Chronicles 26:6), but is in any case soon captured by Assyria.

An anti-Assyrian faction gains power in Babylonia in 734 BCE and begins agitating for the cessation of tribute payments to Assyria.

Tiglath-Pileser in 734 BCE conquers Megiddo and …

… in 732 BCE destroys the city of Hazor.

Making Israel a vassal state, Tiglath-Pileser deports its population to Assyria.

Ahaz, after Assyria defeats Syria and Israel, presents himself as a vassal to the Assyrian king.

Not only is Judah's political situation unimproved; Assyria also exacts a heavy tribute and introduces Assyrian gods into the Temple at Jerusalem (2 Kings 1-6 Isaiah 7-8).

Ahaz introduces a new Aramaean-style altar in the Jerusalem Temple and adopts other foreign customs that will be counted against him in the book of Kings.

The Middle East: 729–718 BCE

Tiglath-Pileser III and the Height of Assyrian Expansion

By 729 BCE, Tiglath-Pileser III has successfully ushered Assyria into its final and most expansive phase of imperial conquest, dominating vast regions across Syria, Palestine, and into Arabia. His military campaigns have decisively established Assyrian dominance, effectively laying the foundations of what is often called the Second Assyrian Empire.

To celebrate and immortalize his military triumphs, Tiglath-Pileser commissions elaborate bas-reliefs for his new royal residence at Nimrud (ancient Kalhu). These monumental sculptures vividly depict his victories, each inscribed with detailed annals narrating his campaigns, serving both as royal propaganda and as lasting testament to Assyrian power. (This palace, known as the "Central Palace," will later be dismantled by the Assyrian king Esarhaddon.)

Consolidation of Babylonia and Assyria

Facing increasing unrest from Babylonia, particularly threats from Chaldean tribes intent on rebellion, Tiglath-Pileser acts swiftly in 729 or 728 BCE. To neutralize these threats, he seizes direct control of the Babylonian throne, uniting Assyria and Babylonia into a single imperial domain. In Babylon, Tiglath-Pileser rules under his personal name, Pulu, as recorded in biblical sources (II Kings 15:19; I Chronicles 5:26). This political unification stabilizes the southern frontiers, but it also sets a critical precedent for future Assyrian policy toward Babylonia.

Transition to Shalmaneser V

Tiglath-Pileser III dies soon afterward, in 727 BCE, having irrevocably shaped Assyria's trajectory toward its ultimate zenith. His successor is Ululayu, believed to be his son, previously known as the governor of Zimirra in Phoenicia. Upon his accession, Ululayu assumes the royal name Shalmaneser V (rendered in Akkadian as Shulmanu-asharid, though the name Shalmaneser is familiar through biblical accounts). Shalmaneser V inherits an empire at its greatest extent, yet also faces the immense challenge of preserving the vast territories and complex administrative structure forged by his predecessor.

Thus, the period from 729 to 718 BCE marks a critical era of Assyrian history, defined by Tiglath-Pileser's final achievements and the subsequent challenges faced by Shalmaneser V in managing the sprawling empire.

Tiglath-Pileser III has inaugurated the last and greatest phase of Assyrian expansion, having subjected Syria and Palestine to his rule, his conquests having paved the way for the establishment of the Second Assyrian Empire.

He has engraved his royal annals across the bas-reliefs depicting his military achievements on the sculptured slabs decorating the royal palace he has built for himself in Nimrud (the so-called "central palace" later to be dismantled by Esarhaddon).

He seizes the increasingly belligerent Babylonian throne in 729 or 728  to forestall a Chaldean-led rebellion.

He merges the kingdoms of Assyria and Babylonia, using his personal (or perhaps Babylonian) name of Pulu (II Kings 15:19; I Chronicles 5:26).

He dies soon afterward in 727, having set Assyria on the road it is to follow to its end.

He is succeeded by Ululayu, probably his son, who had first appeared as governor of Zimirra in Phoenicia and who now takes the name Shalmaneser V. (The name Shalmaneser is used for him in the Bible; his name in Akkadian cuneiform is actually Shulmanu-asharid.)

Near East (729–718 BCE): The Fall of Samaria and Nubian Expansion

The Fall of the Kingdom of Israel

King Hoshea of Israel, encouraged by Egypt, attempts to break free from Assyrian domination. In retaliation, the Assyrian king Shalmaneser V personally leads his forces into Israel in 724 BCE, besieging the Israelite capital, Samaria, and attacking the city of Tyre. After a three-year siege, Samaria falls in 722 BCE. Shalmaneser, however, dies shortly before the capture, and his successor, Sargon II, claims credit for the city's conquest, deporting over twenty-seven thousand inhabitants to Syria—marking the historical disappearance of the "ten lost tribes" of Israel.

Sargon II’s Consolidation

After the capture of Samaria, Sargon II refounds the city as the Assyrian province of Samerina, repopulating it with settlers from Babylon, Cuthah, Avva, Hamath, and Sepharvaim. He also conquers the Philistine city of Gaza, destroys Rafah, and secures a decisive victory against Egyptian forces. However, the Assyrian siege of Tyre, aided by Phoenician mainland cities, ends unsuccessfully after five years, with Assyrian forces withdrawing in 720 BCE.

Nubian Dominance in Egypt

In Egypt, Piye, the ruler of the Nubian kingdom of Kush, exploits internal divisions to extend his influence northward. In response to the alliance formed by Tefnakht of Sais among Delta rulers, Piye launches a successful military campaign in his twentieth regnal year, which he views as a holy war dedicated to Amun. Piye swiftly captures Herakleopolis, Hermopolis, and the ancient capital of Memphis, securing the submission of Delta rulers, including Iuput II of Leontopolis and Osorkon IV of Tanis. Tefnakht ultimately submits indirectly, maintaining nominal independence in Lower Egypt after Piye's withdrawal to Nubia.

Egyptian Fragmentation and Twenty-fourth Dynasty

Following the collapse of Egypt’s Twenty-second Dynasty with the death of Shoshenq V around 720 BCE, Lower Egypt splinters into city-states controlled by local kings. Prominent among these is Tefnakht I, who establishes himself as the "Great Chief of the West" and the founding ruler of Egypt’s short-lived Twenty-fourth Dynasty based in Sais. Although nominally submitting to Piye, Tefnakht soon declares independence and asserts himself as a king.

Legacy of the Era

The era 729–718 BCE witnesses significant shifts in power dynamics in the Near East, marked by the dramatic collapse of the northern Kingdom of Israel under Assyrian conquest and the rise of Nubian authority over a fragmented Egypt. These events reshape regional politics profoundly, setting the stage for ongoing interactions and confrontations among emerging powers, particularly Assyria and the Kushite dynasty in Egypt.