Vajiravudh, also known as King Rama VI, reigning title Phra Mongkut Klao Chao Yu Hua (Thai: ????????; RTGS: Wachirawut; 1 January 1881 – 26 November 1925), was the sixth monarch of Siam under the Chakri dynasty, ruling from 1910 until his death in 1925.
King Vajiravudh is known for his efforts to create and promote Siamese nationalism.
His reign was characterized by Siam's movement further towards democracy and minimal participation in World War I.