 Clausewitz's influence spread to British thinking as well, though at first more as a historian and analyst than as a theorist.See for example Wellington's extended essay discussing Clausewitz's study of the Campaign of 1815—Wellington's only serious written discussion of the battle, which was widely discussed in 19th-century Britain.Clausewitz's broader thinking came to the fore following Britain's military embarrassments in the Boer War (1899–1902).