Try logging on the the Imperial War Museum website - this site also has useful links
Britain
well, they joined when britain was at war
France joined on the Allies side with Britain.
Scotland is part of Britain and when Britain declared war (August 1, 1914), Scotland automatically joined the war.
Britain had a treaty to protect the neutrality of Belgium.
which war?
No, France gave in to Germany, and Germany then took over France. We did not help them. Not in World War I, the war the question asks about. Britain joined France in its fight againt Germany during the first World War.
Britain and France joined the war, becaus Germany invaded Poland. The reason for this is that Britain and France had a pact with Poland, Denmark and Belgium.
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.
The Allies, i.e Britain, France etc.
Britain Joined WWII because Hitler would not withdraw his troops from Poland so Neville Chamberlain declared war.
The 8th of December 1941 was the date that the US joined world war 2