The United States (United States of America), the Soviet Union (Union of Soviet Socialist Republics), Germany (the German Federal Republic) (early period of the Anti-Japanese War), Commonwealth countries (with the United Kingdom as the main body, An alliance composed of 54 countries)
Germany was the first to provide assistance to China, but later stopped its assistance due to pressure from Japan.
Before World War II, Germany maintained good relations with China. As of 1936, German investment in China reached US$136.4 million. After the outbreak of the Anti-Japanese War, Germany twice provided China with combat supplies worth tens of millions of marks, and lent China as much as 1 billion marks. With the help of Germany, China's weapons industry developed rapidly in the 1930s, and the performance of some weapons has caught up with the West.
The person who helped China the most was the United States
The U.S. aid policy to China began after the outbreak of the European War. From the end of 1938 to November 1940, U.S. loans to China totaled US$170 million. In January 1941, Roosevelt announced: "We are determined to fully support the people of all countries who are resolutely resisting, so that this hemisphere can avoid war." In April, the United States assisted China with US$45 million in military supplies, and then provided China with a loan of US$50 million. After the outbreak of the Pacific War, the United States provided a loan of US$500 million to China and signed a US$870 million Sino-US Lend-Lease Agreement with the Nationalist Government. In August 1941, the United States formally incorporated the American Volunteer Air Corps (Flying Tigers) founded by Chennault into the regular army, participated in the battles on the Chinese battlefield, and played a major role in the Anti-Japanese War.
Britain: After Japan occupied South China and Central China, Britain felt that its interests in China had been seriously violated, and successively provided aid and loans to China of approximately 24 million pounds. The British people established many anti-Japanese aid groups and donated money and materials to China's anti-Japanese front line.
Soviet Union: On August 21, 1937, China and the Soviet Union signed the "Non-Aggression Treaty" in Nanjing. In the following years, China and the Soviet Union signed three loans worth a total of US$250 million to aid China. In addition, from October 1937 to September 1939, China received 985 aircraft, more than 1,300 cannons, more than 14,000 machine guns, 2,050 trucks and other materials and equipment from the Soviet Union. The Soviet Union also sent 6 squadrons of volunteer aviation units to China to assist the Kuomintang government in building its air force and participating in the air war against Japan. During this period, the number of Soviet military advisers and experts in China reached 3,665. During World War II, it was an important foreign aid force for China.
In addition to the above countries, France, Canada, Denmark, the Philippines and other countries also extended a helping hand during the Anti-Japanese War and provided varying amounts of loan assistance to China.
However, during the Anti-Japanese War, overseas Chinese in our country also contributed a force that cannot be ignored