# All of his refugees ... armies will fall by the sword

"Soldiers will kill all his refugees ... armies"

# the ones who remain will be scattered in every direction

"the ones who remain alive will flee in every direction" or "the enemy soldiers will scatter in every directions the ones who remain alive"

# know that I am Yahweh

"understand that I am Yahweh, the one true God". Yahweh implies that they will know that he is the one true God who has supreme authority and power. See Ezekiel 6:7.