For that crime public opinion was not prepared either in France or England, but it had for two years at least been the settled policy of the German military staff, and it had even been foretold in England a year before that the German attack would proceed by way of Liège and Namur. There had also been military "conversations" between Belgian and British officers with regard to possible British assistance in the event of Germany's violation of Belgian neutrality. But the Belgian Ministry was naturally reluctant to proceed far on that assumption, which might have been treated as an insult by an honest or dishonest German Government; and it was impossible for England to press its assistance upon a neutralized State which could not even discuss it without casting a slur upon the honour of its most powerful neighbour. Nor was England bound by treaty to defend the neutrality of Belgium. She had been so bound by a treaty concluded during the Franco-Prussian War; but that treaty expired in the following year, and the treaty of 1839, which regulated the international situation of Belgium, merely bound the five great signatory Powers not to violate Belgian neutrality without obliging them individually or collectively to resist its violation. It was not in fact regarded in 1839 as conceivable that any of the Great Powers would ever violate so solemn a pledge, and there was some complacent satisfaction that by thus neutralizing a land which had for centuries been the cockpit of Europe, the Powers had laid the foundations of permanent peace. But the bond of international morality was loosened during the next half-century, and in the eighties even English newspapers argued in favour of a German right-of-way through Belgium for the purposes of war with France. It does not appear that the treaty was ever regarded as a serious obstacle by the German military staff; for neither treaties nor morality belong to the curricula of military science which had concluded that encirclement was the only way to defeat a modern army, and that through Belgium alone could the French defence be encircled. The Chancellor admitted that technically Germany was wrong, and promised full reparation after the war. But he was never forgiven the admission, even by German jurists, who argued that treaties were only binding rebus sic stantibus, while the conditions in which they were signed remained substantially the same; and Germans had long cast covetous eyes on the Congo State, the possession of which, they contended, was inconsistent with Belgium's legal immunity from attack in Europe.