The British in OTL ensured Belgium neutrality in the Treaty of London in 1839.
From the wikipedia website, "When the Germans invaded Belgium in August 1914 in violation of the Treaty, the British declared war on August 4. Informed by the British ambassador that Britain would go to war with Germany over the latter's violation of Belgium neutrality, German Chancellor Theobald von Bethmann-Hollweg infamously exclaimed in frustration that he could not believe that Britain and Germany would be going to war over a mere 'scrap of paper.'"
Did the ancient treaty not really count anymore and Britain just used it as an exuse to side with France in OTL? I heard the claim made eariler on here that it was the up and coming threat of Germany that caused Britain to enter the war, and that the invasion of Belgium was just the pretext they needed. However if both sides invade Belgium, than Britain has no moral high ground in which to justify an attack on Germany. I am not sure how much the "moral high ground" actually matters but it is probably useful to stir up popular support for war on the homefront and has uses in international politics.
From the wikipedia website, "When the Germans invaded Belgium in August 1914 in violation of the Treaty, the British declared war on August 4. Informed by the British ambassador that Britain would go to war with Germany over the latter's violation of Belgium neutrality, German Chancellor Theobald von Bethmann-Hollweg infamously exclaimed in frustration that he could not believe that Britain and Germany would be going to war over a mere 'scrap of paper.'"
Did the ancient treaty not really count anymore and Britain just used it as an exuse to side with France in OTL? I heard the claim made eariler on here that it was the up and coming threat of Germany that caused Britain to enter the war, and that the invasion of Belgium was just the pretext they needed. However if both sides invade Belgium, than Britain has no moral high ground in which to justify an attack on Germany. I am not sure how much the "moral high ground" actually matters but it is probably useful to stir up popular support for war on the homefront and has uses in international politics.