On August 4, 1914, the last chance for averting war between England and Germany went by. On that date the British Foreign Office had telegraphed to its Envoy at Brussels: "You should inform Belgian Government that if pressure is applied to them by Germany to induce them to depart from neutrality, his Majesty's Government expect that they will resist by any means in their power, and that his Majesty's Government will support them in offering such resistance, and that his Majesty's Government in this event are prepared to join Russia and France, if desired, in offering to the Belgian Government at once common action for the purpose of resisting use of force by Germany against them, and a guarantee to maintain their independence and integrity in future years."
Germany, through its Intelligence Department, was aware that this note had been sent, but the invasion of Belgium began, nevertheless. Then came an ultimatum from England. As soon as the British Foreign Office had learned that German troops had crossed the border and that the fortifications at Liege had been summoned to surrender to the German army, this telegram was sent to the British Ambassador at Berlin:
"London Foreign Office, August 4, 1914. We hear that Germany has addressed note to Belgian Minister for Foreign Affairs stating that German Government will be compelled to carry out, if necessary, by force of arms, the measures considered indispensable.
"We are also informed that Belgian territory has been violated at Gemmenich.
"In these circumstances, and in view of the fact that Germany declined to give the same assurance respecting Belgium as France gave last week in reply to our request made simultaneously at Berlin and Paris, we must repeat that request and ask that a satisfactory reply to it and to my telegram of this morning [which said that England was bound to protest against violation of Belgian neutrality] be received here by twelve o'clock to-night. If not, you are instructed to ask for your passports and to say that his Majesty's Government feel bound to take all steps in their power to uphold the neutrality of Belgium and the observance of a treaty to which Germany is as much a part as ourselves."