poland
Well Italy declared war on n Briton and France because the French and British declared war on Germany and Italy was a key strong ally to Nazi Germany
Poland
italy
Poland.
Belgium .
The 1939 invasion of Poland caused Britain to declare war on Germany, which started WWII.
It was Technically Germany by Stepping into Poland and breaking the appeasement with France and England.
Czechoslovakia
if you mean which country it was Poland
1939
declare war on Germany