[SauronOfMordor]

In order for the progeny to end up in human communities, then what you almost certainly have to have human women sleep with Neanderthal men. If what you have is human men ravishing Neanderthal women, the progeny are gonna end up back over in the Neanderthal community, and needless to mention all those went dead.

There is a long history of men taking women prisoner as sex slaves. The only question would be if it was possible to make Neanderthal women submit to such over the long term

[AntiGuv]

There is a long history of men taking women prisoner as sex slaves. The only question would be if it was possible to make Neanderthal women submit to such over the long term.

Yes, but Neanderthal females would've been physically as strong as a human male. And again, the odds that Neanderthals and humans spoke the same language are probably somewhere between zero and none. Finally, the kinds of behaviors that are rational and predictable amongst, say, medieval conquistadors or classical legionaries, are hardly identical to those expected of prehistoric subsistence foragers. In other words, keeping a (burly, angry, unintelligible) female slave requires a major devotion of energy and resources.

[AntiGuv]

PS. And yet again, I'd remind you that we do not find mixed communities in the fossil records. Slaves leave behind skeletons too...