The northern kingdom is destroyed (2 kings 15:30-31; 2 kings 17:1-4)

Meanwhile, back in the north, Hoshea, son of Elah kills King Pekam in a coup d'état. That happens a lot in the north.

Hoshea did evil in the sight of God. Plus all those prophecies by Amos, Micah, and Isaiah about Ephraim being destroyed.

It is time....

By this time, the northern kingdom is a vassal state of the Assyrian Empire. We can assume that their allies the Arameans are long gone as well. Hoshea is tired of paying tribute to the Assyrians, so he sends envoys to the king of Egypt to help with the Assyrians. The Assyrian king discovers this and sends the army against Samaria. The siege last for 3 years and Hoshea is taken captive. The Assyrians follow their standard protocol of their empire and deport the entire population of the northern kingdom to be assimilated into the Assyrian empire.

Following the Assyrian empire protocol, other people conquered elsewhere would then be transplanted into what was the northern kingdom of Israel.

Otherwise, the 10 northern tribes are now "lost". But if we follow Isaiah's prophecy about the north, at least some remnant of Israel remain and look to God. I do not know if this is recorded in the Bible or in history. The Biblical text then focuses exclusively on the southern kingdom from here on.

A quick succession of northern kings (2 Kings 15)

Jeroboam II - Zechariah (end of Jehu's mini-dynasty)

Shallum

Menahem - Pekahiah

Pekah

Hoshea

Zechariah became king after Jeroboam II died. He did evil in God's sight and reigned only 6 months before being assassinated in a coup d'état. He was the fourth generation of descendants after Jehu and his reign fulfilled God's promise to Jehu.

Shallum is the man who assassinated Zechariah and became king. He reigned one month before being assassinated by Menahem, who became the next king.

Menahem reigned for 10 years and did evil in God's sight. He massacred the civilian population at Tirzah and ripped open the stomachs of pregnant women. Previously, such war atrocities had been done by foreign invaders. Here, an Israelite king is doing it.

The king of Assyria invaded the northern kingdom but Menahem bought him off with silver. Menahem levied heavy taxes to pay off the Assyrians for them to withdraw the invasion.

His son Pekahiah became king after Menahem died. Pekahiah did evil in God's sight, ruled for 2 years, and was killed in a coup d'état by the commander of his army, Pekah.

Pekah reigned for 20 years and he did evil in God's sight. During his reign, the Assyrian army returned. This time, they captured a number of towns and took the population into exile in their empire. Here, we have the warnings of Amos starting to be fulfilled - Israelites being taken into exile. However, one the Israelites disappear as captives into the Assyrian empire, they lost their cultural identity and become lost to history.

Amos' warning also contained a promise that the people could escape invasion exile if they repented. The rest of the northern kingdom is still intact, but will they repent now that Amos' prophecy is starting to come true?

Meanwhile, Hoshea assassinates Pekah and became king.