Poland, on 1 September 1939
Poland
germanys invasion of Poland was the last straw in many violations of the treaty of varsailles [ a treaty that severly limited germanys power, established after WWI] and England, fearing an invasion [ especilly since churchill had a large part in aforementioned treaty] so they declared war along with France.
It attacked Poland from the east as part of the nazi-soviet pact.
Well, they kind of declared war on Germany alongside the French, if you want to call that a reaction.
Invasion of poland
The invasion of poland by germany
They started fighting germany.
The German invasion of Poland started World War Two.
The 1939 invasion of Poland caused Britain to declare war on Germany, which started WWII.
invasion of poland
Its invasion of Poland.