In 1899 the second Anglo-Boer War broke out which resulted in the two republics being incorporated into the British Empire.
Due to the title of this post you've probably gathered that there's a relationship between barbed wire and the Anglo-Boer war. Allow me to explain: Barbed wire was developed in 1860 to keep livestock from wandering into neighbouring properties. It's use spread from France to America and was later used for military purposes in the Spanish-American War during the Siege of Santiago.
The British armed forces must have learned from this as only a year after the Seige of Santiago did they use barbed wire to build the infamous concentration camps that kept the Boers wives and children captive.