I believe you misread, they said a high number of males with evidence of trauma. Basically a very large percentage of male skeletons showed damage. The original comment didn't say there were no female skeletons.

Also depending on the dig site mass graves of men killed in combat are common. Those would obviously lack women.

So why aren’t there women skeletons at those conquering tribes? They had to die somewhere.

There probably are, but we don't stumble across them as easily as we do the mass grave dig sites I think