1941
January 6
Kuomintang troops attacked the New Fourth Army with seven divisions in south Anhui in order to start a civil war. The event is called the "South Anhui Incident."
January 25
Japanese troops surrounded Panjiayu in Fengrun County, Hebei Province and killed all the 1,230 people in the village. The shocking event is called the "Panjiayu Massacre."
Late October
Japanese troops launched a massive "mopping-up" campaign in the Taihang Mountains.
November 3
The Japanese army launched "mopping-up" operations in the Yimeng Mountains in Shandong Province with more than 50,000 troops.
December 7
The Japanese achieved a sneak attack on Pearl Harbor, inflicting heavy losses on the American navy base. Japan declared war on the United States, the Soviet Union and the Netherlands. The Pacific war broke out.
December 9
The Kuomintang government published a formal war declaration against Japan, at the same time announcing that China was in a status of war against Germany and Italy.
1942
January 1
Twenty-six countries, including China, Britain, the United States, the Soviet Union and the Netherlands, met in Washington D.C., U.S.A, where they signed a manifesto of war against the Axis countries of Germany, Japan and Italy, saying that none of them would make a separate peace with the enemy.
January 3
Chiang Kai-shek held the post of supreme commander of the Allied forces in the China war zone, responsible for command of the Allied forces of China, Viet Nam and Thailand.
February
China set up an expeditionary army and for the first time entered Burma (present-day Myanmar) to fight alongside the British army there.
May 1-June 30
With Yasuji Okamura in command, more than 50,000 Japanese troops started a "May 1st mopping-up operation" in Central Hebei Plain.
1943
February 2
The Soviet Union defeated Germany in an astounding battle in Stalingrad.
September 6
The 11th Plenary Session of the Fifth Central Executive Committee of the Kuomintang was held.
September 20-November 3
The Japanese started an "autumn mopping-up operation" against the Hebei-Shangdong-Henan base area with 30,000 troops. Fully prepared well before that, the army and people there using flexible tactics fought more than 300 battles, wiping out 11,000 enemy troops.
October
For the second time, the Chinese army entered Burma to fight the Japanese.
Later October
Changde Campaign occurred.
December 2
The Guangdong Dongjiang People's Anti-Japanese Guerrilla Column was set up, with Zeng Sheng as the commander.