Germany invaded Belgium as a path to get to France. (France and Germany had already mutually declared war in support of Austria-Hungary vs. Russia.) The French army was waiting for them on the Frech-German border but by passing thru neutral Belgium, Germany was able to get their army BEHIND the French army. It was called Schlieffen Plan after the German Field Marshal Alfred Graf von Schlieffen, who developed it. Britain had decades earlier pledged to guarantee the territorial integrity of Belgium as it had previously been coveted by Germany, France, and The Netherlands. Actually, it had previously been PART of The Netherlands and its independence was when Britain pledged its support. Germany gambled that Britain would NOT honor its commitment to go to war in support of Belgium. It was STUPID of Germany to think that Britain would ignore its responsibility.
Great Britain, or more correctly The United Kingdom of Great Britain and Northern Ireland, was involved in both World War 1 and World War 2.
Germany entered neutral Belgium on August 4, 1914, Britain then gave an ultimatum to Germany to leave the country. That was refused, and the UK declared war later that same day.
The German violation of Belgian neutrality (invasion of Belgium).
Germany invaded Belgium. Britain had a defense treaty with Belgium. After the invasion, Britain issued an ultimatum stating that if Germany didn't withdraw from Belgium, Britain would declare war. Germany didn't listen and Britain entered World War I.
Germany had a greater army than Great Britain during WWI. Germany outnumbered Great Britain by about 4 million military personnel. Great Britain had to have more numbers from other allies to meet the numbers.
There were no reasons for Great Britain declaring war upon Germany other than Germanys invasion of Poland and their refusal to get out when requested to do so. The Polish had a treaty with the British to come to one anothers aid in case of invasion.
Poland
United states and Great Britain
Great Britain demanded that Germany respect Belgium's neutrality, but Germany refused.
No, to protect itself from invasion.
Britain had an agreement with France that if Poland was invaded they would both step in to help.
Joe J. How has written: 'Invasion of Normandy' -- subject(s): Campaigns, Great Britain, Great Britain. Army. Fife and Forfar Yeomanry, World War, 1939-1945
invasion of Poland
When Germany invaded Poland in 1939, France and Britain, who had promised aid to Poland if Germany invaded, entered the war on the Allied side, thus starting the Second World War.
Britain entered the fighting World War I after the German invasion of Belgium.
Germany's invasion of Russia
Britain took place in the D-Day invasion, also known as the bloodiest invasion in the history of warfare.