Complex sentence: Their Boer opponents taught not only the cavalry but the whole army some lessons, in one engagement at Dronfield 150 Boers held off the British cavalry division which was then supported by several artillery batteries and at Bergendal seventy-four men held up the entire British Army.
Split into simpler sentences: Their Boer opponents taught not only the cavalry but the whole army some lessons. In one engagement at Dronfield 150 Boers held off the British cavalry division which was then supported by several artillery batteries, and at Bergendal seventy-four men held up the entire British Army.