Dave,
I did find some information on the Metz German Imperial District with buildings built by the Kaiser. For example the railway station, the post office and so forth. The Temple Neuf was inaugurated in 1904 when my grandfather was garrisoned there. I found all this in a web site called French Moments www.frenchmoments.eu/metz-german-imperial-district/
However I did not find the actual area my grandfather was garrisoned at until your post. THANK YOU!!! I am making note of it and will put the Campus Bridoux on the list of places to visit. It does not matter that there would be no mention of the Dragoon there. Just knowing that was the spot my grandfather stayed will be enough for me.
Thanks again!
Greg Gertz