The soldiers are very large, very strong, and shaped so differently from the working females that they do not seem at first to belong to the same race.

They help in the work, though they are not able to help in some delicate kinds of work--they are too clumsy and strong.

Now comes the second astonishing fact: these soldiers are all women--amazons, we might call them; but they are sexless women.

In these also sex has been suppressed.
You ask, where do the children come from?
Most of the children are born of special mothers--females chosen for the purpose of bearing offspring, and not allowed to do anything else.

They are treated almost like empresses, being constantly fed and attended and served, and being lodged in the best way possible.