Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

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