They were involved in the Nama rebellion. In 1908, in the last action of the war an expedition led by Friedrich von Erckert (the "father of the camel corps") was dispatched to suppress the last Nama guerilla band, and capture its leader Simon Kopper of the Franzmann Nama (also sometimes called Simon Cooper and Simon Coper). The force consisted of 23 German Officers, 373 rifles, 4 maxim guns, 4 medics, 120 non-whites, 710 camels as well as horses, mules and riding oxen.
They didn't get him. They managed to surprise the Nama and kill about 50 of them in a sharp fight; while losing 14 men themselves, including Erckert shot through the head. Kopper and his band got away. It turned out the battle had taken place inside British territory. They never did catch Kopper, and in the end bought him off. He was given a pension jointly funded by the Germans and British as long as he stayed in Bechuanaland and didn't make a nuisance of himself. He died in 1913.
I'm afraid I don't have blow-by-blow details of the fight itself.