3. _East Prussia._ East Prussia is sacred in another, but also an intense fashion. It is the very kernel of the Prussian monarchy. When Berlin was but a market town for the Electors of Brandenburg, those same Electors had contrived that East Prussia, which was outside the empire, should be recognized as a kingdom. Frederick the Great's father, while of Brandenburg an Elector, was in Prussia proper a king, a man who had emancipated that cradle of the Prussian power. The province in all save its southern belt (which is Polish) is the very essence of Prussian society: a mass of serfs, technically free, economically abject, governed by those squires who own them, their goods, and what might be their soil. The Russians wasted East Prussia in their first invasion, and they did well though they paid so heavy a price, for to wound East Prussia was to wound the very soul of that which now governs the German Empire. When the landed proprietors fled before the Russian invasion, and when there fled with them the townsfolk, the serfs rose and looted the country houses. In a way quite different from Belgium, quite different from Alsace-Lorraine, East Prussia is essential. Forces will and must be sent periodically to defend that territory, however urgently they may be needed elsewhere, as the pressure upon Germany increases. The German commanders, if they forget East Prussia for a moment in the consideration of the other essential points, will, the moment their eyes are turned upon East Prussia again, remember with violent emotion all that the province means to the reigning dynasty and its supporters, and they will do anything rather than let that frontier go. The memory of the first invasion is too acute, the terror of its repetition too poignant, to permit its abandonment.