Because German troops had crossed the border into Belgium, contravening a longstanding treaty that guaranteed Belgian neutrality.
Great Britain and France declared war on Germany in 1939, because germany had invaded land that Great britain had to protect for france.
Great Britain and France declared war on Germany in 1939, because germany had invaded land that Great britain had to protect for france.
Great Britain and the United States were allies to defeat Germany so the US would not attack Great Britain.
To response to Germany invasion of Belgium.
yes
The event was Germany invading Poland.
Why did Great Britain declare war on Germany? Great Britain declared war on Germany because German tanks forced their way across the Polish border on august 4th 1914
The English did not declare war on Germany, Great Britaindeclared war on Germany because Germany had invaded other European countries with which Great Britain had a mutual defense agreement.
Great Britain and France declared war on Germany in 1939, because germany had invaded land that Great britain had to protect for france.
Historians generally accept that the war began on 1 September, 1939, when Nazi Germany invaded Poland. In response to this bold move, the French, Great Britain, and most of her commonwealths (ie; Canada, Australia, New Zealand, etc.) declared war on Germany.
It caused Great Britain and France to declare war on Germany.
England did not declare war on Germany. Great Britain did. England is not an independent nation. Nonetheless the Answer is still Poland.