Arcane Topic Warning: Part the Fourth

[Raynor]

Concerning your question:

Unfortunately, as far as I know, that is the only time that Tolkien mentioned this type of warfare (although, if somebody could point me to something I’ve missed/forgotten/blatantly overlooked I’d appreciate it).

there is this passage that springs to mind concerning the battle of the last alliance:

Originally Posted by Of the rings of power and the third age, Silmarillion

From Imladris they crossed the Misty Mountains by many passes and marched down the River Anduin, and so came at last upon the host of Sauron on Dagorlad, the Battle Plain, which lies before the gate of the Black Land. All living things were divided in that day, and some of every kind, even of beasts and birds, were found in either host, save the Elves only.