Strait of Malacca
Although the international trade through the Strait of Malacca had been favoured since the 6th century, the overland routes from the coastal towns in Southern Myanmar to the port towns of central Thailand were favoured until the early Rattanakosin period. Together with the rice commerce, Sukhothai, Ayudhya and Rattanakosin became one of the trans-peninsula routes parallel with the Strait of Malacca.