Britain declared war on Germany because Germany attacked Belgium in order to strategically invade France. Britain vowed to protect Belgium, so Britain joined World War I.
Significant for Great Britain, the war was not global yet as the US was not in it; and Germany would not invade Britain since they did not control the air.
Austria, Czechoslovakia, and Poland (The U.K. declared war 3 days later, after Hitler ignored a British ultimatum to leave).
France. Germany and France share a border.
Poland. Germany had previously agreed in the Munich Agreement that if they were allowed to annex Sudetenland of Czechoslovakia they would not invade anywhere else. The Agreement was signed by Germany, Italy, Britain and France. Italy was allied with Germany so Britain and France declared war when Hitler invaded Poland in direct violation of the agreement.
Germany did not invade Britain in WW2. Britain has not been invaded for a thousand years.
september 1939
Germany
Poland.
Poland.
Germany invaded France and Poland also it invaded Austria. World War 2 started because Germany said to England they wouldn't invade Poland but they did - so Poland is the easiest country to remember that was invaded!
poland and france
new zealand and Britain
In war -to the victors go the spoils !!.
If you mean WW2, Op Sea lion (invasion of Britain) was a failure.
Efuhfrhfirgfrfrrire you are stupid for not knowing ths
nek minnit