From: The War Room
The only problem, I imagine, is whether the engine is capable of properly tracking the numbers. Some enemy soldiers die of hunger, especially if they don't surrender after losing their capital and retreating to the wastes. Only soldiers who surrender should be converted into pops.
If that's impossible, the next best thing would be to spawn "refugee centres" based on enemy's total losses. Abstract, not that realistic, but it would still be better than what we have now. If it generates fewer pops than surrender, maybe they just don't want to join, or die of disease in POW camps. If more, that means some undiscovered free folks who escape to your territories, or deserters, or anything else. If it produces pops even when no fights are going on, perhaps it's processing POWs captured earlier, or deserters, or refugees. It still answers more question than it makes you ask.
I need ten females for each male...