A rare original framed plan of the battle of Dettingen. On 27 June 1743, King George II commanded the British Army against the French at Dettingen. It was the last time a reigning British monarch would personally lead troops into battle. This 18th-century conflict was caused by the question of Maria Theresa’s succession to the Austrian crown. During the war, known as the War of the Austrian Succession, British troops proved their worth as soldiers.