List of commanders-in-chief of the Royal Thai Army
Royal Thai Army

No.
Portrait
Rank
Name
Term begins
Term ends
11 (1)
-
General
Phraya Phahonphonphayuhasena (Phot Phahonyothin)
1932
1938
12 (1)
-
Field Marshal
Luang Phibunsongkhram (Plaek Phibunsongkhram)
1938
1944
13
-
Lieutenant General
Phichit Kriangsakphichit
6 Aug 1944
24 Aug 1944
11 (2)
-
General
Phraya Phahon Phonphayuhasena (Phot Phahonyothin)
1944
1946
14
-
General
Adul Aduldejcharat (Bhat Peungprakhun)
1946
1947
12 (2)
-
Field Marshal
Luang Phibunsongkhram (Plaek Phibunsongkhram)
1947
1948
15
-
Field Marshal
Phin Choonhavan
1948
1954
16
-
Field Marshal
Sarit Thanarat
1954
1963
17
-
Field Marshal
Thanom Kittikachorn
1963
1964
18
-
Field Marshal
Praphas Charusathien
1964
1973
19
-
General
Kris Sivara
1973
1975
20
-
General
Boonchai Bamroongpong
1975
1976
21
-
General
Serm Na Nagara
1976
1978
22
Prem Tinsulanoda cropped.JPG
General
Prem Tinsulanonda
1978
1981
23
-
General
Prayut Jarumanee
1981
1982
24
-
General
Arthit Kamlang-ek
1982
1986
25
-
General
Chavalit Yongchaiyudh
1986
1990
26
-
General
Suchinda Kraprayoon
1990
1992
26
-
General
Isarapong Noonpakdee
7 Apr 1992
31 Jul 1992
28
-
General
Vimol Vongvanich
1992
1995
29
-
General
Pramon Plasindhi
1995
1996
30
-
General
Chettha Thannajaro
1996
1998
31
-
General
Surayud Chulanont
1998
2002
32
-
General
Somtat Attanand
2002
2003
33
-
General
Chaiyasit Shinawatra
2003
2004
34
-
General
Prawit Wongsuwan
2004
2005
35
-
General
Sonthi Boonyaratglin
2005
2007
36
-
General
Anupong Paochinda
2007
2009
37
-
General
Prayut Chan-o-cha
2010
2014
38
-
General
Udomdej Sitabutr
2014
2015
39
-
General
Teerachai Nakwanich
2015
2016
40
-
General
Chalermchai Sitthisart
2016
2018
41
-
General
Apirat Kongsompong
2018
Incumbent

Question: Who replaced whom as the Commander of the Royal Siamese Army in 1938?
Answer: In 1938, Luang Phibunsongkhram replaced Phraya Phahonphonphayuhasena as Commander of the Royal Siamese Army.