The Lao state dates only from 1945. The idea of a separate Lao nationality was formed during the 19th century, when western ideas of national identity reached South-East Asia, and when the Lao-speaking peoples (Dialect of Dai - see below) were being squeezed between two expansionist powers, Siam (Thailand) and Annam (Vietnam). The current borders of Laos were created by France in 1893 and 1904.
Today the official history of Laos is traced back to the Kingdom of Lān Xāng, which was founded in 1353. But in reality the Lao share a common history with the Siamese and other people of the Tai language group, and Lān Xāng was only one of a number of Tai kingdoms in a region which had a broad linguistic and cultural unity before the arrival of outside powers.