Asia Pacific, 31 Aug 1939: Nomonhan Incident
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Political map of East Asia and the Western Pacific on 31 Aug 1939 (Second Sino-Japanese War: Nomonhan Incident), showing the following events: Hainan Island Operation; Japan occupies Spratly Islands; Battles of Khalkhin Gol; Siam becomes Thailand; Molotov–Ribbentrop Pact.

S o v i e t U n i o n

D u t c h E a s t I n d i e s(Neth.)

Japanese
Empire

Mongolia(Sov. sat.)

Nationalist

China

South Seas Agency(Jap. mand.)

A u s t r a l i a(Br. dom.)

Philippines(US)

New Guinea(Aus. mand.)

Warlords(Nat. Ch. infl.)

French
Indochina(Fr. prot.)

Solomon Is.(Br.)

Hawaii(US terr.)

Malaya(Br. prot.)

Tuva(Sov. sat.)

Xinjiang(Sov. infl.)

Papua(Aus. terr.)

Manchukuo(Jap. pup.)

Alaska(US terr.)

Sarawak(Br. prot.)

Kuril Islands(Jap.)

Prov. Gov.
China(Jap. pup.)

Ref. Gov.
China(Jap. pup.)

Ryukyu Is.(Jap.)

N. Borneo(Br. prot.)

Brunei(Br. prot.)

P. Timor(Port.)

Inner
Mongolia(Jap. prot.)

Nauru(Aus. mand.)

W. Samoa(NZ mand.)

American
Samoa(U.S.)

Gilbert

Islands(Br.)

Ellice Is.(Br.)

Union Is.(NZ terr.)

Phoenix Is.(Br.)

Marshall

Islands(Jap.)

Mariana

Islands(Jap.)

C a r o l i n e I s l a n d s(Jap.)

Paracel Is.(Jap. occ.)

Spratly Is.(Jap. occ.)

Bonin Is.(Jap.)

Volcano Is.(Jap.)

International
Date Line

Feb 1939Japanese take Hainan

Apr 1939Japanese take
Spratly Islands

11 May–16 Sep 1939Nomonhan Incident:
Japan beaten back in
clash with Soviet Union

Jun 1939Siam renamed
to Thailand

23 Aug 1939Molotov-Ribbentrop Pact between
Germany & Soviet Union

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