The formation of the King's German Legion resulted from the occupation of Hanover, their homeland, by the French in 1803. After assorted expeditions including Copenhagen in 1807 and Moore's retreat to Corunna, the Legion joined Sir Arthur Wellesley in the Peninsula. It was here that they were to earn undying renown as the crack corps of Wellington's army. The Legion represented about 20% of Wellington's fighting strength and distinguished itself in all the major actions, including their famous charge at Garcia Hernandez during the Salamanca campaign (1812), which was fought during the Peninsular War (1808-1814).