Uparat
The Front Palace Crisis or the Front Palace incident () (Wang Na crisis) was a political crisis that took place in the Kingdom of Siam from 28 December 1874 to 24 February 1875 (93 of the Rattanakosin Era). The crisis was a power struggle between the reformist King Chulalongkorn (Rama V) and the conservative Prince Bovorn Vichaichan, the Vice King. Chulalongkorn came to the throne in 1868, Vichaichan was appointed Front Palace or Vice King in the same year.