In what year did the United States enter WW II?
1941
1941
1941
1941
1941
1941
1941
1941
1941
1941
1941
1941
1941
1939
1941
1941
1941
1939
1941
1941
1939
1941
1941
1941
1939
1939
1939
1939
1939
1939
1939
1939
1939
1942
1939
1942
3 1941
1942
1939
1942
1942
3 1941
1939
1940
1942
1940
1939
1942
2 1941
1940
3 1941
1939
1942
1940
1942
1939
1940
1942
2 1941
1939.
1940
1939
1942
3 1941
1940
1941
1939
1942
239 AD
1940
1939.
2 1941
239
1942
339 AD
1941.
1940
1898
1942
1941
1940
3 1941
1941.
1898
1942
1939.
1940
239
239 AD
1941.
1942
2 1941
1898
1940
339
339 AD
1941
1942
3 1941
1941.
1 December 1941
1940
2nd 1941
1898
1942
1939.
239 BC
239
2nd AD
1940
1941.
3 1942
1898
1939,
1942
2nd 1941
239 AD
339
December 1941
2 1941
1940
1941.
1942
339 AD
3 1942
1898
1941
1940
3 1941
1939.
239 BC
239
2nd AD
2nd 1941
1941.
1939,
1940
3 1942
1898
339
2 1941
239 AD
1940
1941.
December 1941
2nd 1941
3 1942
1898
339 AD
1939.
239 BC
3 1941
1940
239
1941
1941.
1939,
2nd 1941
3 1942
1898
1940
339
339 BC
1939.
239 AD
3 1941
1941.
2 1941
3 1942
2nd 1941
1898
339 AD
239
1941
1939,
1941.
3 1942
1898
2nd 1941
1939.
3 1941
339
1941.
December 1941
2 1941
239 AD
239
3 1942
1898
2nd 1941
1939,
1939.
3 1941
1941.
3 1942
1941
2 1941
2nd 1941
239
1941.
3 1941.