Books 1 and 2 of the Psalms focused on the reign of David and his sons (Psalms 1–72). Seeing the kingdom fall in Book 3 is heart-rending:
Psalm 79:1 O God, the nations have invaded your inheritance; they have defiled your holy temple, they have reduced Jerusalem to rubble.
The disintegration began when Solomon died and the kingdom split (1 Kings 12). Only Judah (the southern kingdom) retained the Davidic kingship and worshipped in Jerusalem. The northern tribes made Samaria their capital, crowning their own kings, setting up their own worship centres. Eventually, both kingdoms fell.
Psalm 80 responds to the fall of Israel to Assyria in 722 BC. Psalm 89 responds to the fall of Judah to Babylon in 586 BC. We’ll keep Psalm 89 for next time.
