Isa 3:25 Your men shall fall by the sword, and your mighty in the war.
Isa 3:26 And her gates shall lament and mourn; and she shall sit deserted on the ground.
Notes : The strong men of Judah overcome in battle
This is an address to Jerusalem itself, by a change not uncommon in the writings of Isaiah. In the calamities coming on them, their strong men should be overcome, and fall in battle. Barnes Notes. Their Strong men would be overwhelmed in the battle that was coming.
2Ch 36:16 But they mocked the messengers of God and despised His words, and ill-treated His prophets until the wrath of Jehovah arose against His people, until there was no healing.
2Ch 36:17 And He caused the king of the Chaldeans to go up against them. And he killed their choice ones by the sword in the house of their holy place, and had no pity on the young man and the virgin, the old man and the very aged; He gave all into his hand.
2Ch 36:18 And all the vessels of the house of God, great and small, and the treasures of the house of Jehovah, and the treasures of the king, and of his rulers, he brought all these to Babylon.
2Ch 36:19 And they burned the house of God, and broke down the wall of Jerusalem, and burned all the palaces of it with fire, and destroyed all its beautiful vessels.
2Ch 36:20 And the ones who had escaped from the sword he carried away to Babylon, where they were servants to him and his sons until the reign of the kingdom of Persia,
2Ch 36:21 to fulfill the Word of Jehovah in the mouth of Jeremiah, until the land had enjoyed its sabbaths. All the days of the desolation it kept the sabbath, to the full measure of seventy years.
v.26. And her gates shall lament and mourn; and she shall sit deserted on the ground.
The wooden gates were burnt with fire and the few poor people who were left just sat on the ground a sign of great dejection and defeat.
“she shall sit deserted on the ground”. What a graphic picture of mourning and deep distress.
Lam 2:8 Jehovah purposed to destroy the wall of the daughter of Zion; He has stretched out a line; He has not withdrawn His hand from swallowing, and He made rampart and wall lament; they languish together.
Lam 2:9 Her gates have sunk in the ground; He has destroyed and broken her bars. Her kings and her rulers are among the nations. The Law is no more; also her prophets also find no vision from Jehovah.
Jeremiah says the same thing about Jerusalem above. These are marks of great sorrow. In the Psalms we read, “By the Waters of Babylon we sat down and wept when we remembered Zion.” The destruction of Jerusalem would be Lamented with Great Distress and lamentations.
Here are women faced with trying to remove the rubble of a Destroyed city of Berlin after the defeat of Hitler in WW2
What a description of the ruin and destruction that will come to every people and every city that refuses to acknowledge God and His Reign in the earth.