During the Peninsular War, the British under Arthur Wellesley landed in Portugal in 1808 and never left the continent until the Emperor Napoleon's eventual abdication in 1814. During the Hundred Days campaign of 1815, British troops fought alongside Prussians, Brunswickers, Nassauers, Hanoverians, Dutch and Belgians in order to defeat the French at Waterloo.
Either in Spain or in Belgium, British armies were small yet very professional. The British almost always had to be supported by allies in order to counter the larger French armies. But in the end, the British infantry and cavalry had earned the reputation of being among the most effective troops in the Napoleonic wars.
British Light Dragoons
British 1st Infantry Brigade
British 2nd Infantry Brigade
British 3rd Infantry Brigade
British 4th Infantry Brigade
British 5th Infantry Brigade
British Light Infantry Skirmishers and Riflemen