And not have military units to protect the sovereign which Field Marshal Phin Choonhavan Chief of the Royal Thai Army at that time.

The Prime Minister approved the establishment of the first main military unit separates from 2nd Infantry Battalion, 11th Infantry Regiment Phetchaburi Province traveled to the site at Kho Hong Camp (Sena Narong Camp), Hat Yai District, Songkhla Province on 19 February 1939 and the following year.

In the year 1941 At Franco-Thai War the army ordered the battalion in the south to be a reserve unit.

In 1941, as World War II, Japan was hit by Thailand to Burma And Malaysia on December 8, 1941, by troops ashore on the east coast of the provinces.

Thailand had a well-trained military of 26,500 men, together with a reserve force which brought the army's numbers up to about 50,000.

The Royal Thai Army started to set up the new military units in the Kra Peninsula including:[1] In 1949 Thailand and Malaysia had Joint Operation fighting communist guerillas in Malaya Betong district of Yala province.

While Royal Thai Army has deep threat analysis of Thailand 1–2 decades, if disputes of foreign troops.