All medieval and classic cultures of the ancient world, including those on which Tolkien modeled his elves, routinely exposed their young and marriageable women to the fortunes of war, because bearing and raising the next generation of warriors is not needed for equality-loving elves. Equality-loving elves. Who are monarchists. With a class system. Of ranks. Battles are more fun when attractive young women are dismembered and desecrated by goblins! I believe that this is one point where C.S. Lewis, J.R.R. Tolkien, and all Christian fantasy writers from before World War Two were completely agreed upon, and it is a point necessary in order correctly to capture the mood and tone and nuance of the medieval romances or Norse sagas such writers were straining their every artistic nerve and sinew to create. So, wait, we have an ancient and ageless society of elves where the virgin maidens go off to war, but these same virgin maidens must abide by the decision of their father or liege lord for permission to marry? -- The Desolation of Tolkien
~ John C. Wright