He didn't stop there. His proposal for a military establishment for the professional training of army officers initially met with opposition. He persevered, and the Royal Military College was founded in 1801, where he served as its inaugural Lieutenant-Governor. Later relocating to Sandhurst, the institution evolved to become the world-famous Royal Military Academy.
In 1811, Major-General Le Marchant joined the Duke of Wellington's army in Portugal and Spain. At the Battle of Salamanca he led what is considered to be one of the most successful British cavalry charges of the Peninsular War. He was killed during the battle, aged 46. A fearless cavalry officer and commander, expert swordsman, visionary and reformer, talented artist and devoted family man, Le Marchant's legacy lives on at Sandhurst.