Phayap Army

Phayap Army
Active	May 1942 – August 1945
Country	Thailand
Branch	Royal Thai Army
Role	Infantry
Garrison/HQ	Kengtung
Engagements	World War II Burma Campaign

Phayap Army (Thai: ทัพพายัพ RTGS: Thap Phayap or Payap, northwest)^[1] was the Thai force that invaded Burma on 10 May 1942 during the Burma Campaign of World War II.

Order of battle of Phayap Army 1942

Further information: Order of battle

Phayap Army (Northern Army) - Lieutenant General Jarun Rattanakun Seriroengrit

2nd Infantry Division - Major General Luang Phairirayordejd
- 4th Infantry Regiment (Prachinburi) which consisted of
  - 10th Infantry Battalion (Prachinburi)
  - 11th Infantry Battalion (Prachinburi)
  - 12th Infantry Battalion (Prachinburi)
- 5th Infantry Regiment which consisted of
  - 13th Infantry Battalion
  - 14th Infantry Battalion
  - 15th Infantry Battalion
- 12th Infantry Regiment (Phitsanuloke) which consisted of
  - 28th Infantry Battalion (Nakhon Sawan)
  - 29th Infantry Battalion (Phitsanulok)
  - 33rd Infantry Battalion (Phitsanulok)
- 4th Artillery Battalion (Prachinburi)
- 5th Artillery Battalion (Prachinburi)
- 6th Artillery Battalion
- Attached:
  - 5th Cavalry Battalion / Cavalry Division
  - Tank squadron / Armoured Regiment
3rd Infantry Division - Major General Phin Choonhavan
- 7th Infantry Regiment (Nakhon Ratchasima) which consisted of
  - 19th Infantry Battalion (Nakhon Ratchasima)
  - 20th Infantry Battalion (Nakhon Ratchasima)
  - 21st Infantry Battalion (Nakhon Ratchasima)
- 8th Infantry Regiment (Surin) which consisted of
  - 17th Infantry Battalion
  - 18th Infantry Battalion
  - 52nd Infantry Battalion
- 9th Infantry Regiment (Ubon Ratchathani) which consisted of
  - 25th Infantry Battalion (Ubon Ratchathani)
  - 26th Infantry Battalion (Ubon Ratchathani)
  - 27th Infantry Battalion (Ubon Ratchathani)
- 7th Artillery Battalion (Nakhon Ratchasima)
- 8th Artillery Battalion (Nakhon Ratchasima)
- 9th Artillery Battalion
- Motorcycle Reconnaissance Squadron
- Tank squadron
4th Infantry Division - Colonel Luang Haansongkhram
- 3rd Infantry Regiment (Lopburi) which consisted of
  - 4th Infantry Battalion (Lopburi)
  - 6th Infantry Battalion (Lopburi)
  - 8th Infantry Battalion (Saraburi)
- 13th Infantry Regiment (Lampang) which consisted of
  - 30th Infantry Battalion (Lampang)
  - 31st Infantry Battalion (Chiang Mai)
  - 34th Infantry Battalion (Lampang)
- 3rd Artillery Battalion
- 10th Artillery Battalion (Nakhon Sawan)
Cavalry Division - Lieutenant Colonel Thwuan Wichaikhatkha
- 35th Cavalry Regiment which consisted of
  - 3rd Cavalry Battalion (Ubon Ratchathani)
  - 5th Cavalry Battalion (Roi Ed)
- 46th Cavalry Regiment which consisted of
  - 4th Cavalry Battalion (Chanthaburi)
  - 6th Cavalry Battalion
Tank Battalion
12th Independent Cavalry Regiment which consisted of
- 1st Cavalry Battalion (Bangkok)
- 2nd Cavalry Battalion (Prachinburi)
35th Infantry Battalion (Chiang Mai)
1st Engineer Battalion (Ratchaburi)
2nd Engineer Battalion (Chachoengsao)
3rd Engineer Battalion
4th Engineer Battalion
1st Artillery Battalion (Bangkok)
11th Artillery Battalion
Phayap Army AA Battalion
Phayap Army Transport Battalion
Phayap Army Water Transport Battalion

Reorganization

During the fighting, Phayap Army has added the following units by regrouping

The 17th Infantry Regiment (Batterfield) which consisted of
- 32nd Infantry Battalion (Nakhon Sawan)
- 35th Infantry Battalion (Chiang Mai)
- 39th Infantry Battalion (Nakhon Si Thammarat)

Bad weather forced the early dissolution of the cavalry division and moving the 35th Cavalry Regiment to Roi Et and the 1st Cavalry Battalion (Royal Guard using Australian stallions) back to BKK.

Nevertheless, the RTA created the following units to replace the cavalry units in the Phayap Army:

11th Heavy Machine Gun Battalion
1st Machine Gun Battalion
2nd Machine Gun Battalion
27th Artillery Battalion
29th Artillery Battalion

2nd Army

After peace in Kentung has been restored in 1943, the Royal Thai Army has withdrew some units of the Phayap Army and created the 2nd Army as a reserve force.

In 1943, RTA created The 2nd Army (Lopburi) which consisted of

1st Division (Chiang Rak) which consisted of
- 1st Infantry Regiment (Bangkok) which consisted of
  - 1st Infantry Battalion (Royal Guard) (Bangkok)
  - 3rd Infantry Battalion (Bangkok)
  - 9th Infantry Battalion (Bangkok)
- 2nd Infantry Regiment (Bangkok) which consisted of
  - 2nd Infantry Battalion (Bangkok)
  - 7th Infantry Battalion (Bangkok)
  - 37th Infantry Battalion (Ratburi)
  - 45th Infantry Battalion (Phetburi)
1st Cavalry Battalion (Moved out of Phayap Army back to Bangkok after dissolving the 12th Independent Cavalry Regiment due to the diseases which killed Australian horses used by 1st Cavalry Battalion)
1st Artillery Battalion
7th Division (Lopburi) consisted of
- 19th Infantry Regiment (Bua Chum, Chai Badan district of Lopburi) which consisted of
  - 58th Infantry Battalion (Bua Chum, Chai Badan district of Lopburi)
  - 59th Infantry Battalion (Bua Chum, Chai Badan district of Lopburi)
- 20th Infantry Regiment (Lom Sak district of Phetchabun)
  - 60th Infantry Battalion (Lom Sak district of Phetchabun)
  - 61st Infantry Battalion (Lom Sak district of Phetchabun)
- 21st Infantry Regiment (Wang Chomphoo in Lom Kao district of Phetchabun)
  - 62nd Infantry Battalion (Wang Chomphoo in Lom Kao district of Phetchabun)
  - 63rd Infantry Battalion (Wang Chomphoo in Lom Kao district of Phetchabun)
  - 64th Infantry Battalion (Wang Chomphoo in Lom Kao district of Phetchabun)
- 12th Infantry Regiment (Moved out of Phayap Army back to Nakhon Sawan) consisted of
  - 28th Infantry Battalion (Nakhon Sawan)
  - 65th Infantry Battalion (Nakhon Sawan)
- 6th Inf. Reg (Move out of Phayap Army back to Phitsanulok) consisted of
  - 29th Inf. Bat. (Phitsanulok) - separated from the 12th Inf. Reg
  - 66th Inf. Bat. (Nakhon Sawan)
  - 67th Inf. Bat. (Tak)

37th Division

In 1944, the Royal Thai Army created the following units to help train the Seri Thai (Free Thai Movement).

37th Division (Nakhon Ratchasima which consisted of
- 107th Infantry Regiment (Nakhon Ratchasima)
- 35th Cavalry Regiment (Roi Ed) - move from Phayap Army - consisted of
  - 3rd Cavalry Battalion (Ubon Ratchathani)
  - 5th Cavalry Battalion (Roi Et)
- the 108th Infantry Regiment (Udon Thani - Nakhon Phanom)
- the 9th Infantry Regiment (Ubon Ratchathani) - move from Phayap Army
  - 25th Infantry Battalion (Ubon Ratchathani)
  - 26th Infantry Battalion (Ubon Ratchathani)
  - 27th Infantry Battalion (Ubon Ratchathani)

Demobilization

After the peace declaration on 16 August 1945, the following units of Phayap Army along with war time units were dissolved and demobilized:

30 October 1945: The following units were dissolved and demobilized

11th Heavy Machine Gun Battalion
1st Machine Gun Battalion
2nd Machine Gun Battalion
27th Artillery Battalion
29th Artillery Battalion

13 November 1945: The following units were dissolved and demobilized

Phayap Army HQ
2nd Army
7th Division
37th Division
18th Mixed Brigade at 4 States of Melayu
20th Infantry Regiment
107th Infantry Regiment.
4th Cavalry Battalion
6th Artillery Battalion
14th Artillery Battalion
32nd Infantry Battalion (Nakhon Sawan)
33rd Infantry Battalion (Reserved Forces)
34th Infantry Battalion (Lampang)
35th Infantry Battalion (Chiang Mai)
54th Infantry Battalion
56th Infantry Battalion
40th Infantry Battalion (Trang)
41st Infantry Battalion (Songkhla)

Postwar Reorganization

The postwar reorganization of Royal Thai Army in 1946:

1st Army Circle (Bangkok) consisted of
- the 1st Infantry Regiment (Royal Guard) (Bangkok) - which consisted of
  - 1st Infantry Battalion (Royal Guard) (Bangkok)
  - 3rd Infantry Battalion (Royal Guard) (Bangkok)
  - 9th Infantry Battalion (Royal Guard) (Bangkok)
- the 11th Infantry Regiment (Bangkok) - Renamed from the 2nd Infantry Regiment - which consisted of
  - 2nd Infantry Battalion (Bangkok)
  - 7th Infantry Battalion (Bangkok)
  - 37th Infantry Battalion (Ratchaburi)
  - 45th Infantry Battalion (Phetburi)
2nd Army Circle (Prachinburi) consisted of
- 2nd Infantry Regiment (Lopburi) - Renamed from the 3rd Infantry Regiment consisted of
  - 4th Infantry Battalion
  - 6th Infantry Battalion
  - 8th Infantry Battalion
- 12th Infantry Regiment (Prachinburi) - Renamed from the 4th Infantry Regiment consisted of
  - 10th Infantry Battalion
  - 11th Infantry Battalion
  - 12th Infantry Battalion
3rd Army Circle consisted of
- the 3rd Infantry Regiment (Nakhon Ratchasima) - Renamed from the 7th Infantry Regiment consisted of
  - 19th Infantry Battalion
  - 20th Infantry Battalion
  - 21st Infantry Battalion
- 13th Infantry Regiment (Ubon Ratchathani) - Renamed from the 9th Infantry Regiment consisted of
  - 25th Infantry Battalion (Ubon Ratchathani)
  - 26th Infantry Battalion (Ubon Ratchathani)
  - 27th Infantry Battalion (Ubon Ratchathani)
4th Army Circle consisted of
- 4th Infantry Regiment (Nakhon Sawan) which consisted of
  - 28th Infantry Battalion (Nakhon Sawan)
  - 29th Infantry Battalion (Phitsanuloke)
  - 30th Infantry Battalion (Lampang)
  - 31st Infantry Battalion (Chiang Mai)
5th Army Circle (Nakhon Si Thammarat) which consisted of
- 5th Infantry Battalion (Hat Yai - Songkhla)
- 38th Infantry Battalion (Chumporn)
- 39th Infantry Battalion (Nakhon Si Thammarat)
- 42nd Infantry Battalion (Khok Pho - Pattani)

Air Force

Chief-of-the-Air-Staff - Group Captain Khun Ronnaphakasd

90th Combined Wing - ?

41st Squadron
- Curtiss Hawk III
42nd Squadron
- Curtiss Hawk III
32nd Squadron
- Vought Corsair V-93s
11th Squadron
- Mitsubishi Ki-30
12th Squadron
- 17 Mitsubishi Ki-30
61st Squadron
- Martin 139WS
62nd Squadron
- Mitsubishi Ki-21-I

References

↑ Glenn Slayden, ed. (29 Sep 2013). "พายัพ" (Dictionary). Royal Institute Dictionary - 1982. Thai-language.com. Retrieved 2013-09-29. Royal Institute - 1982 พายัพ /พา-ยับ/ {Sanskrit: วายวฺย ว่า ของวายุ} [นาม] ชื่อทิศตะวันตกเฉียงเหนือ. horizontal tab character in |quote= at position 77 (help)

Sources

Thailand
The Northern Campaign
- Phayap Army
สงครามมหาเอเซียบูรพา - จากวันวีรไทย ถึง วันประกาศสงคราม (Thai)
ประวัติศาสตร์การสงครามของไทยในสงครามมหาเอเซียบูรพา, กรมยุทธศึกษาทหาร กองบัญชาการทหารสูงสุด. 2540 (Thai)

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