Poland
Poland .
The first country was Poland. On 1 September 1939, German forces invaded Poland so on 3 September 1939, Britain and France declared war on Germany.
September 1st 1939.
no
Denmark and Norway.or Norway and denmark
September 1st 1939.
September 17, 1939
1 September 1939.
September 1, 1939.
They invaded Poland.
september 1939