I know this gentleman didn't actually serve, but was that likely to have been because he was a German subject?
THE DEVON YEOMANRY.
...."It is stated that a German gentleman, Baron Von Trutzschler, has volunteered for active service in South Africa with the Royal 1st Devon Yeomanry Cavalry and Royal North Devon Hussars, and has been accepted. He has seen four years' service in the German army. Baron von Trutzschler is one of the most prominent hunting men in Devon, and during the past season has hunted with Mr. Scott Browne's, the Lamerton, and Mr. Bathurst's hounds. He is known as a very straight rider." North Devon Journal, Thursday 18th January 1900
From the little I can find about him online, he seems to have been living in Cheshire by 1906, although he and his family also had property in what is now Germany. How much time they spent in England is unknown.
* Tsar Nicholas II, Emperor of Russia, was colonel-in-chief of 2nd Dragoons (The Royal Scots Greys) from 1894 to 1918.
the person from the paper slip is not Maximilan but Robert von Trutzschler (originally: Robert Franz Oswald Adolph von Trützschler auf Falkenstein). He ist also called „Baron Bertie von Trutzschler“ in some documents. He was born in Grossenbehringen on Mai, 24th, 1876. In the 1890ies he lived in Berlin/Lichterfelde, the place of the „Haupt-Kadetten-Anstalt“ of the German (Prussian) Armee. That makes me believe he got his military education there.
Baron Bertie Trutzschler got married in Nantwich, Cheshire, England on Sept., 13., 1906 to Catarine („Kitty“) Murphy. They got four children, amongst them Maximilan, born in 1910.
Baron Bertie Trutschler kept all his life in England and died there in Gorstella, Kinneron, on February 14th, 1940..
I am interested in the biographie of his son, Maximilian, who was a Britsh subject but also served in the German army. Maximilian was captured in Russia and the Soviets kept him in a P.O.W. camp in Russia until 1950. Just a few months after he came free and back to England he emigrated, together with his mother and his divorced sister Mafalda von Kalckreuth to Tanzania or South Africa. He was still alive when his mother died in 1962. I would be interested in more details about his life in Africa, especially when and where he died.