[quote=Mortalbean]
Britain did not enter the war of their own accord, they were allied with Belgium who was invaded by Germany. Britain couldn't afford to back out of the agreement as that would cripple their ability to secure allies in the future.Edit:Germany thought Britain wouldn't honor the treaty because Britain was already on sketchy terms with a lot of the big players in Europe and Germany thought that the British would give up on the treaty because they wouldn't want to fight a war.What Germany didn't realize was that Britain had done secret diplomacy with France and Russia over Egypt.Got school now...
[/quote]

Just like the US will back up the Phillippines and Japan.