WWII Country Entrance Order

Put in the name of the country according to the date and order that they entered WWII.

From the point of fighting or declaration of war.

Includes sub-wars within the greater World War (such as Winter War).

Does not include countries whose entrance was just a declaration of war near the end.

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Last updated: August 22, 2025

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First submitted	March 1, 2017
Times taken	388
Average score	76.9%
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Date	Hint	Answer
July 7th 1937	Aggressor	Japan
	Invaded	China
September 1st 1939	Aggressor	Germany
	Invaded	Poland
September 3rd 1939	Declared War	U.K.
	Declared War	France
	Declared War	New Zealand
	Declared War	Australia
September 10th 1939	Declared War	Canada
September 17th 1939	Aggressor	Soviet Union
November 30th 1939	Invaded	Finland
April 9th 1940	Invaded	Denmark
	Invaded	Norway
May 10th 1940	Invaded	Belgium
	Invaded	Netherlands
	Invaded	Luxembourg
June 10th 1940	Aggressor	Italy
October 1940	Aggressor	Thailand
October 28th 1940	Invaded	Greece
November 20th 1940	Joined Alliance	Hungary
November 22nd 1940	Joined Alliance	Romania
November 23rd 1940	Joined Alliance	Slovakia
March 1st 1941	Joined Alliance	Bulgaria
April 6th 1941	Invaded	Yugoslavia
June 15th 1941	Joined Alliance	Croatia
December 7th 1941	Was Attacked	USA

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5 Comments

Level 70

Mar 1, 2017

Isn't Finland the aggressor? And Albania was invaded by Italy.

Level 65

Mar 2, 2017

Entrance into WWII doesn't mean there had to be a declaration of war, and I also stated fighting such as the Winter War is included. Finland was attacked by Russia then, therefore that was when I consider their involvement of the war started. Albania was already part of Italy when they entered the war, so I didn't add them.

Level 65

Mar 2, 2017

Any ideas or advice to improve this quiz are welcome!^^

Level 61

Apr 26, 2017

New Zealand declared war on Germany at the same time as Australia and the UK.

Level 61

Feb 12, 2019

Accept USSR for Soviet Union?