Edward VIII was King of the United Kingdom and the Dominions of the British Empire, and Emperor of India, from 20 January 1936 until his abdication on 11 December the same year.Edward was the eldest son of King George V and Queen Mary. He was created Prince of Wales on his sixteenth birthday, nine weeks after his father succeeded as king. As a young man, he served in the British Army during the First World War and undertook several overseas tours on behalf of his father.Edward became king on his father's death in early 1936. He showed impatience with court protocol, and caused concern among politicians by his apparent disregard for established constitutional conventions. Only months into his reign, he caused a constitutional crisis by proposing marriage to Wallis Simpson, an American who had divorced her first husband and was seeking a divorce from her second. After his abdication, he was created Duke of Windsor. He married Simpson in France on 3 June 1937, after her second divorce became final.