The King's German Legion (KGL) was a British Army unit of expatriate German personnel, known for its excellent discipline and fighting ability.
The Legion was formed within months of the dissolution of the Electorate of Hanover in 1803, and constituted as a mixed corps by the end of 1803. Although The Legion never fought autonomously and remained a part of the British Army during the Napoleonic Wars (1804–15), it played a vital role in several campaigns, most notably the Walcheren Campaign, the Peninsular War, and the Hundred Days (1815).
At the Battle of Waterloo, the 2nd Light Battalion - with members of the 1st Light Battalion and the 5th Line Battalion - famously defended the farmhouse and road at "La Haye Sainte." As the 5th Line Battalion under Oberst Ompteda was on its way to reinforce the defenders of Haye Sainte, the French cavalry rode them down; only a few of the intended relievers survived. After a six hour defence, without ammunition, or reinforcements, the Germans were forced to abandon the farm, leaving the buildings in shambles and their dead behind.