Question: When did the allies enter world war 2?

Disambiguated questions and answers:
context: At the start of the war on 1 September 1939, the Allies consisted of France, Poland and the United Kingdom, as well as their dependent states, such as British India. Within days they were joined by the independent Dominions of the British Commonwealth: Australia, Canada, New Zealand and South Africa. After the start of the German invasion of North Europe until the Balkan Campaign, the Netherlands, Belgium, Greece, and Yugoslavia joined the Allies. After first having cooperated with Germany in invading Poland whilst remaining neutral in the Allied-Axis conflict, the Soviet Union perforce joined the Allies in June 1941 after being invaded by Germany. The United States provided war materiel and money all along, and officially joined in December 1941 after the Japanese attack on Pearl Harbor. China had already been in a prolonged war with Japan since the Marco Polo Bridge Incident of 1937, but officially joined the Allies in 1941.
question: When did the first of the allies enter world war 2?
short_answers: 1939

1 September

1 September 1939
wikipage: Allies of World War II

context: No context provided
question: When did the last of the allies enter world war 2 by declaring war on Japan?
short_answers: 1945-08-10

August 1945

context: Because of Cuba's geographical position at the entrance of the Gulf of Mexico, Havana's role as the principal trading port in the West Indies, and the country's natural resources, Cuba was an important participant in the American Theater of World War II, and subsequently one of the greatest beneficiaries of the United States' Lend-Lease program. Cuba declared war on the Axis powers in December 1941, making it one of the first Latin American countries to enter the conflict, and by the war's end in 1945 its military had developed a reputation as being the most efficient and cooperative of all the Caribbean nations. On 15 May 1943, the Cuban patrol boat CS-13 sank the German submarine "U-176".
question: When did the United States enter world war 2?
short_answers: December 8, 1941

December 1941
wikipage: Allies of World War II

context: At the start of the war on 1 September 1939, the Allies consisted of France, Poland and the United Kingdom, as well as their dependent states, such as British India. Within days they were joined by the independent Dominions of the British Commonwealth: Australia, Canada, New Zealand and South Africa. After the start of the German invasion of North Europe until the Balkan Campaign, the Netherlands, Belgium, Greece, and Yugoslavia joined the Allies. After first having cooperated with Germany in invading Poland whilst remaining neutral in the Allied-Axis conflict, the Soviet Union perforce joined the Allies in June 1941 after being invaded by Germany. The United States provided war materiel and money all along, and officially joined in December 1941 after the Japanese attack on Pearl Harbor. China had already been in a prolonged war with Japan since the Marco Polo Bridge Incident of 1937, but officially joined the Allies in 1941.
question: When did the Soviet Union enter world war 2?
short_answers: June 1941
wikipage: Allies of World War II

context: No context provided
question: When did the China enter world war 2?
short_answers: June 1937

context: New Zealand was a sovereign Dominion under the New Zealand monarchy, as per the Statute of Westminster 1931. It quickly entered World War II, officially declaring war on Germany on 3 September 1939, just hours after Britain. Unlike Australia, which had felt obligated to declare war, as it also had not ratified the Statute of Westminster, New Zealand did so as a sign of allegiance to Britain, and in recognition of Britain's abandonment of its former appeasement policy, which New Zealand had long opposed. This led to then Prime Minister Michael Joseph Savage declaring two days later:
question: When did the United Kingdom enter world war 2?
short_answers: 3 September 1939
wikipage: Allies of World War II

Long answers:
long_answer: China entered World War 2 in June 1937, and at the start of the war on 1 September 1939, the allies consisting of France, Poland and the United Kingdom, as well as their dependent states, such as British India, entered. On 3 September 1939, New Zealand entered declaring war on Germany. In June 1941, the Soviet Union entered, and on December 8, 1941 the United States. 1945-08-10 the last of the allies entered World War 2 by declaring war on Japan.