This was a fair warning to Austria and it was understood; they took it as an intimation that hostilities were intended, and from this day began quietly to make their preparations. As soon as they did this, they were given into Bismarck's hands; the Prussians, owing to the admirable organisation of the army, could prepare for war in a fortnight or three weeks' time less than the Austrians would require; Austria to be secure must therefore begin to arm first; as soon as she did so the Prussian Government would be able, with full protestation of innocence, to point to the fact that they had not moved a man, and then to begin their own mobilisation, not apparently for offence but, as it were, to protect themselves from an unprovoked attack. In a minute of February 22d Moltke writes that it would be better for political reasons not to mobilise yet; then they would appear to put Austria in the wrong; Austria had now 100,000 men in Bohemia and it would be impossible to undertake any offensive movement against Prussia with less than 150,000 or 200,000; to collect these at least six weeks would be required, and the preparations could not be concealed. Six days later a great council was held in Berlin. "A war with Austria must come sooner or later; it is wiser to undertake it now, under these most favourable circumstances, than to leave it to Austria to choose the most auspicious moment for herself," said Bismarck. The rupture, he explained, had already really been effected; that had been completed at his last interview with Karolyi. Bismarck was supported by most of the Ministers; the King said that the Duchies were worth a war, but he still hoped that peace would be kept. The arrangement of the foreign alliances was now pushed on. The King wrote an autograph letter to Napoleon saying that the time for the special understanding had come; Goltz discussed with him at length the terms of French compensation. Napoleon did not ask for any definite promise, but suggested the annexation of some German territory to France; it was explained to him that Prussia would not surrender any German territory, but that, if France took part of Belgium, the Prussian frontier must be extended to the Maas, that is, must include the north-east of Belgium.