According to Jeremiah, this verse means that people from different places have heard about the nation's troubles, and even the strongest warriors have fallen down together and can't help each other. It's like when two big kids bump into each other and both fall to the ground.
Jeremiah 46:12: The nations have heard of thy shame, and thy cry hath filled the land: for the mighty man hath stumbled against the mighty, [and] they are fallen both together.
While Jeremiah 46:12 speaks of the widespread destruction and shame in battle, Proverbs 24:17 advises not to rejoice or be glad over your enemy's downfall, implying a sense of empathy rather than celebrating their shame.
Proverbs 24:17: Rejoice not when thine enemy falleth, and let not thine heart be glad when he stumbleth: