Finally after many decades,The modern state of Saudi Arabia could be established by King Abdul Aziz Al-Saud (also known as Abdul Aziz Ibn Saud). In 1902, he took over the city of Riyadh from another family, named Al-Rashid. He continued to win more areas, and on 8 January 1926, he became the King of Hijaz. On 29 January 1927, he took the title of King of Nejd. On 20th May 1927, the government of the United Kingdom accepted him as the King of the areas ruled by him. His kingdom now became a sovereignty. All the regions under his control were united to form the state of Saudi Arabia by the year 1932. Petroleum oil was found in Saudi Arabia on 3 March 1938, which made the country rich as export of oil started to bring a lot of money.