1940

1940 — Korea: September. The KPG establishes the Korean Liberation Army, a guerrilla army that was intended to eventually fight to liberate the Korean peninsula / China: August — Hundred Regiments Offensive: Communist NRA soldiers under Peng Dehuai began a campaign of terrorism and sabotage against Japanese targets in North China / Japan: Japanese invasion of French Indochina / United States: Bug…

20 events. The text is the source chronology verbatim; the terms are in Sources & licenses. The grey lines above and below are the surrounding 2 years.

KoreaKorea under Japanese rule 1910–1945	ChinaTaiwan 1912–1949	JapanShōwa era 1926–1989	United StatesUnited States 1776–
September. The KPG establishes the Korean Liberation Army, a guerrilla army that was intended to eventually fight to liberate the Korean peninsula. Chōsen Grand Exposition 1938March. Samsung is established in Daegu. 1938국가 총동원법 시행, 지원병제 제정, 조선 의용대 창설 1939국민 징용령 제정 1941대한민국 건국 강령 1942Korean Language Society incident 1942조선 독립 동맹 조직	August — Hundred Regiments Offensive: Communist NRA soldiers under Peng Dehuai began a campaign of terrorism and sabotage against Japanese targets in North China. Battle of West Suiyuan 3月30日汪精衛於南京成立傀儡政权（南京国民政府），发表《和平建国十大政纲》。5月1日枣宜会战开始。12月30日延安新華廣播電台開始播音。ZH 19381938 Yellow River flood 1938Battle of Wuhan 1938Battle of Taierzhuang 1938Battle of Xuzhou 1938Bombing of Chongqing 1939Battle of Nanchang 1939Battle of Kunlun Pass 1939Battle of Suixian–Zaoyang 1939September — The nominally independent Mengjiang was established on the Mongol territories of the Japanese-occupied Chahar and Suiyuan provinces. 1939September — Battle of Changsha: The Japanese army attacked Changsha. 1939日軍轰炸重慶、潼關、洛陽、襄陽、西安、宜昌、泉州、成都等地。裴文中发现北京人头盖骨化石。9月，為紀念淞滬會戰中日首次空戰814空軍大捷，國民政府正式下令8月14日為空軍節。天津发生大水灾。 1941Battle of Hong Kong 1941Battle of South Shanxi 1941Panjiayu Massacre 1941St. Stephen's College massacre 19411941 Chungpu earthquake 1941February — The Communist official Mao Zedong gave a speech in Yan'an entitled "Reform in Learning, the Party and Literature," establishing the Yan'an Rectification Movement and beginning an ideological purge which would claim some ten thousand lives. 1941September — Battle of Changsha: A Japanese army began a general retreat after failing to take Changsha. 1941皖南事变。太平洋戰爭（1941-1945）起。12月9日國民政府对納粹德国、意大利王國及日本帝國宣戰；「滿洲國」對美、英宣戰。陈纳德“飞虎队”入华作战。 1942Chinese famine of 1942–1943 1942中國遠征軍入緬作戰起，投入兵力總計40萬人，傷亡接近20萬人。5月15日浙赣会战开始，5月28日金华沦陷。 1942January — Battle of Changsha: A Japanese army crossed the Xinqiang River after suffering heavy losses in a failed attempt to conquer Changsha.	Japanese invasion of French Indochina 1940 Shakotan earthquake Chōsen Grand Exposition 죽창사건 May to 18 June — Battle of Zaoyang-Yichang begins. March to 3 April — Battle of Wuyuan begins. 1938Tsuyama massacre 1939September to 8 October — Battle of Changsha begins in Hunan Province, China. 1941Soviet–Japanese Neutrality Pact 1941Battle of Hong Kong 1941December — The Empire of Japan attacks the naval base in Pearl Harbor, Hawaii. Japan declares war on the United States, the Kingdom of the Netherlands and the United Kingdom, marking the start of the Pacific War theatre of World War II. 1941April — Soviet–Japanese Neutrality Pact is signed. 1941to 10 December — First Battle of Guam begins. 1942Battle of Midway 1942January — Hideki Tōjō warns Australia with the statement: "If you continue resistance, Japanese will destroy you." 1942Guadalcanal campaign 1942Doolittle Raid 1942Bangka Island massacre 1942March — The naval minister Admiral Shigetarō Shimada says that in view of the Allies' "retaliation and hatred", Japan would no longer follow recognized rules of sea warfare. 1942February — Japan demands the surrender of Singapore. 1942January — Japan declares war on the Netherlands.	Bugs Bunny, Tom and Jerry and Woody Woodpecker make their cartoon debuts Oldsmobile becomes the first car maker to offer a fully automatic transmission Color television is demonstrated by the Columbia Broadcasting System U.S. presidential election, 1940: Franklin D. Roosevelt is reelected president to a record third term, Henry A. Wallace is elected vice president New Hampshire earthquakes 1940 El Centro earthquake Alien Registration (Smith) Act Billboard magazine publishes its first music popularity chart, the predecessor to today's Hot 100 Selective Service Act, establishing the first peacetime draft in U.S. history 1938The comic book superhero Superman debuts in Action Comics #1 (June 1938) 1938Orson Welles' The War of the Worlds broadcast 1938Thornton Wilder’s play Our Town wins Pulitzer Prize 1938Fair Labor Standards Act 1938Wheeler-Lea Act 1939President Roosevelt, appearing at the opening of the 1939 New York World's Fair, becomes the first president to give a speech that is broadcast on television. Semi-regular broadcasts air during the next two years 1939Golden Gate International Exposition 1939Cash and carry proposed to replace the Neutrality Acts 1939Hatch Act, aimed at corrupt political practices and prevented federal civil servants from campaigning 1939Nazi Germany invades Poland; World War II begins 1941Attack on Pearl Harbor 1941Battle of Wake Island 1941Battle of Guam 1941June 22, 1941 – Operation Barbarossa: Nazi Germany begins war against the Soviet Union 1941Regular commercial television broadcasting begins; CBS and NBC television networks launched. 1941January 20, 1941 – President Roosevelt begins third term; Wallace becomes the 33rd vice president 1942Sugar and gasoline are rationed 1942U.S.-controlled Commonwealth of the Philippines conquered by Japanese forces 1942Battle of Los Angeles 1942Cocoanut Grove fire 1942Battle of Dutch Harbor 1942Japanese American internment, German American Internment, and Italian American Internment begin, per executive order by President Roosevelt; the order also authorizes the seizure of their property. 19421945 – Automobile production in the United States for private consumers halted. 1942Casablanca released 1942Revenue Act of 1942

KoreaKorea under Japanese rule 1910–1945

ChinaTaiwan 1912–1949

JapanShōwa era 1926–1989

United StatesUnited States 1776–

September. The KPG establishes the Korean Liberation Army, a guerrilla army that was intended to eventually fight to liberate the Korean peninsula.
Chōsen Grand Exposition

1938March. Samsung is established in Daegu.
1938국가 총동원법 시행, 지원병제 제정, 조선 의용대 창설
1939국민 징용령 제정
1941대한민국 건국 강령
1942Korean Language Society incident
1942조선 독립 동맹 조직

August — Hundred Regiments Offensive: Communist NRA soldiers under Peng Dehuai began a campaign of terrorism and sabotage against Japanese targets in North China.
Battle of West Suiyuan
3月30日汪精衛於南京成立傀儡政权（南京国民政府），发表《和平建国十大政纲》。5月1日枣宜会战开始。12月30日延安新華廣播電台開始播音。ZH

19381938 Yellow River flood
1938Battle of Wuhan
1938Battle of Taierzhuang
1938Battle of Xuzhou
1938Bombing of Chongqing
1939Battle of Nanchang
1939Battle of Kunlun Pass
1939Battle of Suixian–Zaoyang
1939September — The nominally independent Mengjiang was established on the Mongol territories of the Japanese-occupied Chahar and Suiyuan provinces.
1939September — Battle of Changsha: The Japanese army attacked Changsha.
1939日軍轰炸重慶、潼關、洛陽、襄陽、西安、宜昌、泉州、成都等地。裴文中发现北京人头盖骨化石。9月，為紀念淞滬會戰中日首次空戰814空軍大捷，國民政府正式下令8月14日為空軍節。天津发生大水灾。
1941Battle of Hong Kong
1941Battle of South Shanxi
1941Panjiayu Massacre
1941St. Stephen's College massacre
19411941 Chungpu earthquake
1941February — The Communist official Mao Zedong gave a speech in Yan'an entitled "Reform in Learning, the Party and Literature," establishing the Yan'an Rectification Movement and beginning an ideological purge which would claim some ten thousand lives.
1941September — Battle of Changsha: A Japanese army began a general retreat after failing to take Changsha.
1941皖南事变。太平洋戰爭（1941-1945）起。12月9日國民政府对納粹德国、意大利王國及日本帝國宣戰；「滿洲國」對美、英宣戰。陈纳德“飞虎队”入华作战。
1942Chinese famine of 1942–1943
1942中國遠征軍入緬作戰起，投入兵力總計40萬人，傷亡接近20萬人。5月15日浙赣会战开始，5月28日金华沦陷。
1942January — Battle of Changsha: A Japanese army crossed the Xinqiang River after suffering heavy losses in a failed attempt to conquer Changsha.

Japanese invasion of French Indochina
1940 Shakotan earthquake
Chōsen Grand Exposition
죽창사건
May to 18 June — Battle of Zaoyang-Yichang begins.
March to 3 April — Battle of Wuyuan begins.

1938Tsuyama massacre
1939September to 8 October — Battle of Changsha begins in Hunan Province, China.
1941Soviet–Japanese Neutrality Pact
1941Battle of Hong Kong
1941December — The Empire of Japan attacks the naval base in Pearl Harbor, Hawaii. Japan declares war on the United States, the Kingdom of the Netherlands and the United Kingdom, marking the start of the Pacific War theatre of World War II.
1941April — Soviet–Japanese Neutrality Pact is signed.
1941to 10 December — First Battle of Guam begins.
1942Battle of Midway
1942January — Hideki Tōjō warns Australia with the statement: "If you continue resistance, Japanese will destroy you."
1942Guadalcanal campaign
1942Doolittle Raid
1942Bangka Island massacre
1942March — The naval minister Admiral Shigetarō Shimada says that in view of the Allies' "retaliation and hatred", Japan would no longer follow recognized rules of sea warfare.
1942February — Japan demands the surrender of Singapore.
1942January — Japan declares war on the Netherlands.

Bugs Bunny, Tom and Jerry and Woody Woodpecker make their cartoon debuts
Oldsmobile becomes the first car maker to offer a fully automatic transmission
Color television is demonstrated by the Columbia Broadcasting System
U.S. presidential election, 1940: Franklin D. Roosevelt is reelected president to a record third term, Henry A. Wallace is elected vice president
New Hampshire earthquakes
1940 El Centro earthquake
Alien Registration (Smith) Act
Billboard magazine publishes its first music popularity chart, the predecessor to today's Hot 100
Selective Service Act, establishing the first peacetime draft in U.S. history

1938The comic book superhero Superman debuts in Action Comics #1 (June 1938)
1938Orson Welles' The War of the Worlds broadcast
1938Thornton Wilder’s play Our Town wins Pulitzer Prize
1938Fair Labor Standards Act
1938Wheeler-Lea Act
1939President Roosevelt, appearing at the opening of the 1939 New York World's Fair, becomes the first president to give a speech that is broadcast on television. Semi-regular broadcasts air during the next two years
1939Golden Gate International Exposition
1939Cash and carry proposed to replace the Neutrality Acts
1939Hatch Act, aimed at corrupt political practices and prevented federal civil servants from campaigning
1939Nazi Germany invades Poland; World War II begins
1941Attack on Pearl Harbor
1941Battle of Wake Island
1941Battle of Guam
1941June 22, 1941 – Operation Barbarossa: Nazi Germany begins war against the Soviet Union
1941Regular commercial television broadcasting begins; CBS and NBC television networks launched.
1941January 20, 1941 – President Roosevelt begins third term; Wallace becomes the 33rd vice president
1942Sugar and gasoline are rationed
1942U.S.-controlled Commonwealth of the Philippines conquered by Japanese forces
1942Battle of Los Angeles
1942Cocoanut Grove fire
1942Battle of Dutch Harbor
1942Japanese American internment, German American Internment, and Italian American Internment begin, per executive order by President Roosevelt; the order also authorizes the seizure of their property.
19421945 – Automobile production in the United States for private consumers halted.
1942Casablanca released
1942Revenue Act of 1942