!Souls From an Ancient Battle!

Genesis (Bereshit) Chapter 14 describes a war. The kings of Shinar, Ellasar, Elamand and Goyim attack Sodom, Gomorrah, Admah, Zeboiim, and Belah. They defeat the latter 5 kings in battle. They take the possessions and kidnap Lot. Lot, living in Sodom at the time, was Abraham’s nephew.

Abraham received news of the attack and took his men and attacked the offending army at night. He defeated them, saved Lot and returned the pillaged possessions to the 5 kings. The king of Sodom asked Abraham to give him the souls from his city and to keep the belongings he had recovered. Abraham artfully declined.

Bereshit (Genesis) Chapter 14

21 And the king of Sodom said to Abram, “Give me the souls, and the possessions take for yourself.”
22 And Abram said to the king of Sodom, “I raise my hand to the Lord, the Most High God, Who possesses heaven and earth. 
23 Neither from a thread to a shoe strap, nor will I take from whatever is yours, that you should not say, ‘I have made Abram wealthy.’ 
24 Exclusive of what the lads ate, and the share of the men who went with me; Aner, Eshkol, and Mamre they shall take their share.

How did Abraham end up with souls from the battles without being aware they were happening?