I read this story in High School, sometime before 1993, in English in the USA.

Unfortunately, I don't remember much about it at all, other than that I loved it and almost panicked after I returned it to the library, because I had immediately forgotten the title and author and couldn't ever find the book again!

It is **not** *the Doonfarers of Coramonde* by Brian Daley, although that has been suggested as the solution to me more than once over my years of looking. I'm like 97% sure of that.

I do not recall if this is a short novel or a short story from an anthology, although my impression is that it was a short novel, of the yellow-spined DAW Sci-Fi type.

What I remember of the story is that a person (maybe more than one person?) from the modern world was transported to a misty realm where legendary, mythical cities from Earth existed - Avalon and Tara are the two whose names I can remember, but there were more. Maybe seven.

There was a scene where some modern-ish (but outdated - possibly time-displaced Viet Nam War-era) soldiers showed up briefly and got into a firefight with some mythical creatures - one was attacked and impaled by a Unicorn.

And that's it - that's all I remember. I know it's not much to go on, and I don't remember the beginning or the end, but I'd love to find it again. Hopefully those clues are enough to jog someone's memory!