What year did belgium enter World War I?
Belgium entered World War 1 on August 3, 1914.
Britain entered the war as a result of the German invasion of Belgium, as Britain had a defense treaty with Belgium (Britain wanted to enter the war and found a 100 year old treaty to use as pretext). Italy, who was allied with Germany before the war, did not enter on the German side as they had a defense pact, and joined with the Entente powers with promises of German and Austrian colonies and territory.
Great Britain entered World War 1 on the 4th August 1914, by the 12th August 1914 France and Britain had declared War on Austro-Hungary. Britain entered World War I because Germany invaded Belgium to get into France easier. Britain basically said "Belgium is our ally, and if you invade them we will declare war on you".
Officially, it was the German invasion of Belgium. Britain and Belgium had been allies for around 70 years when the war began. Additionally, since France and Germany had been enemies in the past, their border was heavily fortified on both sides, but Belgium's borders were not as heavily fortified. When the war began, Germany asked Belgium for permission to go through their territory; Belgium said no. So Germany did it anyway and conquered Belgium. When…