September 3rd 1939.
August 4 1914, after Germany did not withdraw from Belgium, Great Britain declared war on Germany.
World War 1 and World War 2 were many battles between Germany and Britain.
Britain didn't start war, Germany did Answer 2 Actually, Britain did! She declared war on Germany. However, she only did this because Germany did not agree to pull out of Poland by a certain date. So who started the war rather depends on your own definition.
germany
There was a deal between Germany and Britain that Germany will not attack France but Hitler break the deal and attacked France, hence Britain jumped into the world war 2.
On September 1939 Poland was invaded by Germany using planes, people and other various equipment. Britain then threatened Germany and announced that if Germany did not withdraw there troops from Poland, Britain would be at war with Germany. Adolf Hitler, Germany's leader refused and coincidentally Britain set war on Germany.
3 September 1939
France and Britain declared war onto Nazi Germany on September 1st 1939. This was the official date of the starting of World War 2.
France and Britain declared war on Germany in response to the invasion of Poland
Britain forgave Germany after the war
I don't agree that the war between Britain and Germany was inevitable because they could always have peace proposals and peace talks where they will talk about what will they do for the betterment of each countries.
At 11.00 pm on 4th August 1914, Britain declared war on Germany. they joined the war to back up belgium when Germany broke their treaty and protect themselves.