1938 (Split)

March

 * 2 - The Nationalist party takes over in Hungary
 * 12 -  and   unite.
 * 14 -  annex the Prince Edward Islands
 * 15 -  presents an ultimatum to Germany, demanding its independence
 * 16
 * Britain declare war on Germany
 * ,,   and   declare war on Germany
 * 17 -  responds to the declaration of war saying "The British Empire is nothing compared to the German Reich"
 * 19 - German U Boat  sinks   off the coast of the Netherlands.
 * 20
 * declare war on the U.K.
 * declare war on Germany.
 * 21 - Nepal, Australia, Canada, New Zealand and South Africa declare war on Hungary
 * 23 - The  takes place.   and   planes fight over the skies of  . The Dutch   send up 15 aircraft, resulting in a three way battle. The League of Nations demand Britain pay reparations.
 * 24 - . Britain and the commonwealth all leave the league of nations. The former British, Australian, South African and New Zealand mandates are transferred to become colonies
 * 27 - Hungary is expelled from the League
 * 28 - The Reformed Government of the Republic of China, a Japanese puppet state, is formed
 * 29 - The British colony (formerly mandate) of Palestine is split into Palestine (Jerusalem Protectorate) and Jordan (Transjordan Protectorate)

April

 * 18 -  surrender to the  . The territory is split into the ,  ,  ,   and the.
 * 20 - The start of the . The ambassador of the league says "that any members who join the German War will be expelled." This leads to many nations leaving the league over lack of freedom of speech.
 * ,,  ,  ,   and   leave.
 * 21 -  leave the league
 * 24
 * and  leave the league.
 * German  land on the
 * 25 -,   and   leave the league
 * 27 -  and   leave the league
 * 28 -,  ,  ,   and   leave the league.

May

 * 1 -  begins. They capture Basel, but have difficulty moving forward due too the Swiss defences and tank traps. The army entering from the east faced ambushes from bases inside the Alps.
 * 2
 * The . Over 300 die as the building if heavily bombed, mainly due to the collapse of the building.
 * The Territories of Papua and New Guinea and merged to form the Territory of Papua New Guinea
 * 3 -  that the remaining members will help to fight against the surge of the Nazi threat. They join the.

Sovereign States

 * [[Image:Kingdom Afghanistan.png|30px]] Afghanistan - Kingdom of Afghanistan
 * [[Image:Flag Kingdom Of Albania.png|30px]] Albania - Kingdom of Albania
 * [[Image:Flag of Andorra.png|30px]] Andorra- Principality of Andorra
 * [[Image:Argentina Flag.png|30px]] Argentina - Argentine Republic
 * [[Image:Flag of Australia.png|30px]]   - Commonwealth of Australia
 * [[Image:Flag of Austria.png|30px]]   - Federal State of Austria (to March 12)
 * [[Image:Belgium.flag.png|30px]]   - Kingdom of Belgium
 * [[Image:Flag of Bolivia.png|30px]] Bolivia - Republic of Bolivia
 * [[Image:Second Flag of Brazil.png|30px]] Brazil - Republic of the United States of Brazil
 * [[Image:Flag of Bulgaria.png|30px]]   - Kingdom of Bulgaria
 * [[Image:Flag of Canada 1921.png|30px]]   - Dominion of Canada
 * [[Image:Chile Flag.png|30px]] Chile - Republic of Chile
 * [[Image:Flag of the Republic of China.png|30px]]   - Republic of China (to April 18)
 * From April 18, Tibet, Sinkaing, Mengjiang, Manchukho and the Japanese territory of China.
 * [[Image:col.png|30px]] Columbia - Republic of Columbia
 * [[Image:(gc)cr.png|30px]] Costa Rica - Republic of Costa Rica
 * [[Image:Flag of Cuba.png|30px]] Cuba - Republic of Cuba
 * [[Image:Flag of Czechoslovakia.png|30px]]   - Czechoslovakia
 * [[Image:Flag of danzig.png|30px]]   - Free City of Danzig
 * [[Image:Denmark Flag.gif|30px]]   - Kingdom of Denmark
 * [[Image:Flag of the Dominican Republic.png|30px]] Dominican Republic
 * [[Image:Flag of EcuadorOTL.png|30px]] Ecuador - Republic of Ecuador
 * [[Image:(dai)egyptflag.png|30px]]   - Kingdom of Egypt
 * [[Image:Flag of El Salvador.png|30px]] El Salvador - Republic of El Salvador
 * [[Image:Estonia.flag.png|30px]] Estonia - Republic of Estonia
 * [[Image:Finland.flag.png|30px]] Finland - Republic of Finland
 * [[Image:France.flag.png|30px]]   - Third French Republic
 * [[Image:Flag of Nazi Germany.png|30px]]   - Third Reich
 * [[Image:Hellenic Kingdom Flag 1935.png|30px]] Greece - Kingdom of Greece
 * [[Image:Flag of Guatemala.png|30px]] Guatemala - Republic of Guatemala
 * [[Image:Flag of Haiti (civil).png|30px]] Haiti - Republic of Haiti
 * [[Image:Flag of Hatay.png|30px]]   - Republic of Hatay (From September 7 to December 18)
 * [[Image:Flag of Honduras.png|30px]] Honduras - Republic of Honduras
 * [[Image:Flag of Hungary.png|30px]][[Image:Flag of hungary(sp).PNG|30px]] Hungary - Republic of Hungary (until March 2)  ''(from March 2)
 * [[Image:Flag of Iceland.png|30px]] Iceland - Kingdom of Iceland
 * [[Image:Flag of Iran (1925).png|30px]] Iran - Imperial State of Iran
 * [[Image:Flag of Iraq 1924.png|30px]] Iraq - Kingdom of Iraq
 * [[Image:Flag of Ireland.png|30px]] Ireland
 * [[Image:Flag of Italy Kingdom.png|30px]] Italy - Kingdom of Italy
 * [[Image:Jpa3.gif|30px]] ''' - Empire of Japan
 * [[Image:Latvia.flag.png|30px]] Latvia - Republic of Latvia
 * [[Image:Flag of Liberia.png|30px]] Liberia - Republic of Liberia
 * [[Image:Flag of Liechtenstein.png|30px]]   - Principality of Liechtenstein
 * [[Image:Flag of Lithuania 1918.png|30px]] Lithuania - Republic of Lithuania
 * [[Image:Flag of Luxembourg.png|30px]] Luxembourg - Grand Duchy of Luxembourg
 * [[Image:Flag of Mexico 1934.png|30px]] Mexico - United Mexican States
 * [[Image:Flag of Monaco.png|30px]] Monaco - Principality of Monaco
 * [[Image:Flag of the People's Republic of Mongolia 1924.png|30px]] Mongolia - People's Republic of Mongolia
 * [[Image:Pre 1962 Flag of Nepal.png|30px]]   - Kingdom of Nepal
 * [[Image:Netherlands.flag.png|30px]]   - Kingdom of the Netherlands
 * [[Image:Flag of the New Zealand.png|30px]]   - Dominion of New Zealand
 * [[Image:Nicaraguan Flag.jpg|30px]] Nicaragua - Republic of Nicaragua
 * [[Image:Flag of Norway.png|30px]] Norway - Kingdom of Norway
 * [[Image:Flag of Panama.png|30px]] Panama - Republic of Panama
 * [[Image:Flag of Paraguay 1842.png|30px]] Paraguay - Republic of Paraguay
 * [[Image:Flag of Peru 1825.png|30px]] Peru - Republic of Peru
 * [[Image:Flag of Poland.png|30px]]   - Republic of Poland
 * [[Image:150px-Flag of Portugal.svg.png|30px]] ''' - Portuguese Republic
 * [[Image:Flag of Romania.png|30px]] Romania - Kingdom of Romania
 * [[Image:Flag of San Marino WS.png|30px]] San Marino - Most Serene Republic of San Marino
 * [[Image:Saudi Arabia Flag 1938.png|30px]] Saudi Arabia - Kingdom of Saudi Arabia
 * [[Image:Flag of Thailand.png|30px]] Siam - Kingdom of Siam
 * [[Image:Sinkaing.gif|30px]]   (from April 18)
 * [[Image:Flag of the Union of South Africa.png|30px]]   - Union of South Africa
 * [[Image:Flag of the Soviet Union 1923.png|30px]]   - Union of Soviet Socialist Republics
 * [[Image:Flag of the Second Spanish Republic.png|30px]] Spain - Spanish Republic
 * [[Image:Flag of Sweden.png|30px]] Sweden - Kingdom of Sweden
 * [[Image:Flag of Switzerland.png|30px]]   - Swiss Confederation
 * [[Image:Flag of International Tangier.png|30px]] Tangier - Free City of Tangier
 * [[Image:Flag of Tibet.png|30px]]   - Tibetan State (from April 18)
 * [[Image:Turkey.png|30px]] Turkey - Republic of Turkey
 * [[Image:otl uk flag.svg|30px]]   - United Kingdom of Great Britain and Northern Ireland
 * [[Image:380px-US_flag_48_stars.svg.png|30px]]   - United States of America
 * [[Image:Uruguay Flag.png|30px]] Uruguay - Eastern Republic of Uruguay
 * [[Image:Flag of the Vatican City.png|30px]] Vatican City - State of the Vatican City
 * [[Image:Old Flag of Venezuela.png|30px]] Venezuela - United States of Venezuela
 * [[Image:Flag of the Mutawakkilite Kingdom of Yemen.png|30px]] Yemen - Mutawakkilite Kingdom of Yemen
 * [[Image:Flag of Yugoslavia Kingdom.png|30px]] Yugoslavia - Kingdom of Yugolsavia

Japan

 * [[Image:Flag of the Republic of China 1912.png|30px]] China - Provisional Government of the Republic of China (to April 18)
 * [[Image:Flag of the Republic of China 1912.png|30px]] China - Reformed Government of the Republic of China (March 28 - April 18)
 * [[Image:Flag of the Republic of China 1912.png|30px]] East Hebei - East Hebei Autonomous Council (to February 1)
 * [[Image:Flag of Manchukuo.png|30px]]   - Great Empire of Manchuria
 * [[Image:Menjiang Flag.svg.png|30px]]   - Mongol United Autonomous Government
 * [[Image:Flag of Dadao Shanghai.png|30px]] Shanghai - Dadao Municipal Government of Shanghai (to April 18)

China

 * [[Image:Flag of Tibet.png|30px]] Tibet (to April 18)

Soviet Union

 * [[Image:Tannu-Tuva-1933.PNG|30px]] Tannu Tuva - Tuvan People's Republic

United Kingdom

 * [[Image:(dai)newfoundlandflag.png|30px]] Newfoundland - Dominion of Newfoundland

United States

 * [[Image:Flag of the Philippines.png|30px]] Philippines - Commonwealth of the Philippines

League of Nation Mandates

 * [[Image:British Cameroons Flag.gif|30px]] Cameroon - British Cameroons (Under British administration) (to 24 March)
 * [[Image:France.flag.png|30px]] Cameroun (Under French administration)
 * [[Image:Flag of Lebanon Fr.gif|30px]] Lebanon - State of Great Lebanon (Under French administration)
 * [[Image:Ausflag.gif|30px]] Nauru (Under Australian, New Zealand and British administration) (to 24 March)
 * [[Image:Ausflag.gif|30px]] New Guinea - Territory of New Guinea(Under Australian administration) (to 24 March)
 * [[Image:Palestine-Mandate-Ensign.png|30px]] Palestine - British Mandate of Palestine (Under British administration) (to 24 March)
 * [[Image:Belgium.flag.png|30px]] Ruanda-Urundi (Under Belgian administration)
 * [[Image:Syria-flag.png|30px]] Syria - French Mandate of Syria (under French administration)
 * [[Image:Flag of Tanganyika.png|30px]] Tanganyika (Under British administration) (to 24 March)
 * [[Image:Flag of the Gold Coast.png|30px]] Togoland - British Togoland (Under British administration) (to 24 March)
 * [[Image:France.flag.png|30px]] Togoland - French Togoland (Under French administration)

Australia

 * [[Image:Ausflag.gif|30px]] Antarctica - Australian Antarctic Territory
 * [[Image:Ausflag.gif|30px]] Ashmore and Cartier Islands
 * [[Image:Ausflag.gif|30px]] Jervis Bay Territory
 * [[Image:Ausflag.gif|30px]] Lord Howe Island
 * [[Image:Ausflag.gif|30px]] Nauru (from 24 March)
 * [[Image:Ausflag.gif|30px]] New Guinea - Territory of New Guinea (24 March to May 2)
 * [[Image:Ausflag.gif|30px]] Norfolk Island
 * [[Image:Ausflag.gif|30px]] Papua New Guinea - Territory of Papua and New Guinea (from May 2)
 * [[Image:Ausflag.gif|30px]] Torres Strait Islands

Chile

 * [[Image:Chile Flag.png|30px]] Easter Island

Japan

 * [[Image:Jpa3.gif|30px]] Bonin Islands
 * [[Image:Flag of the Republic of China 1912.png|30px]]   - Japanese territory of China (from April 18)
 * [[Image:Jpa3.gif|30px]] Karafuto - Karafuto Prefecture
 * [[Image:Jpa3.gif|30px]] Korea
 * [[Image:Jpa3.gif|30px]] Kurile Islands
 * [[Image:Jpa3.gif|30px]] Ryukyu Islands
 * [[Image:Jpa3.gif|30px]] South Pacific - South Seas Islands
 * [[Image:Jpa3.gif|30px]] Taiwan
 * [[Image:Jpa3.gif|30px]] Volcano Islands

United Kingdom

 * [[Image:British Cameroons Flag.gif|30px]] Cameroon - British Cameroons (from 24 March)
 * [[Image:Flag of Jordan.png|30px]] Jordan - Transjordan Protectate (from 29 March)
 * [[Image:Palestine-Mandate-Ensign.png|30px]] Palestine - British Palestine (24 March - 29 March)
 * [[Image:Palestine-Mandate-Ensign.png|30px]] Palestine - Jerusalem Protectorate (from 29 March)
 * [[Image:Flag of Tanganyika.png|30px]] Tanganyika (from 24 March)
 * [[Image:Flag of the Gold Coast.png|30px]] Togoland - British Togoland (from 24 March)

United States

 * [[Image:709px-Flag of Alaska.svg.png|30px]] - Alaska - Territory of Alaska
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - American Samoa
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - Baja Neuvo Bank
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - Baker Island
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - Corn Islands
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - Guam - Territory of Guam
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - Guantanamo Bay - Guantanamo Bay Naval Base Concession
 * [[Image:Hawaii State Flag.png|30px]] - Hawaii - Territory of Hawaii
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - Jarvis Island
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - Johnston Atoll
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - Kingston Reef
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - Midway Island
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - Navassa Island
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - Palmayra Atoll
 * [[Image:Panama Canal Zone Flag.png|30px]] - Panama Canal Zone
 * [[Image:Flag of Puerto Rico (Light blue).png|30px]] - Pueto Rico
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - Quita Sueno Bank, Roncador Cay & Serrana Bank
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - Serranilla Bank
 * [[Image:Flag of the US Virgin Islands.png|30px]] - Virgin Islands - United States Virgin Islands
 * [[Image:380px-US_flag_48_stars.svg.png|30px]] - Wake Island