Thus in the summer of 1793 France seemed to be falling to pieces. It was saved by the imbecility and disunion of the hostile powers. In the north the French army after the treason of Dumouriez could only attempt to cover the frontier. The Austrians were joined by British, Dutch and Prussian forces. Had the Allies pushed straight upon Paris, they might have ended the war. But the desire of each ally to make conquests on his own account led them to spend time and strength in sieges. When Conde and Valenciennes had been taken, the British went off to assail Dunkirk and the Prussians retired into Luxemburg. In the east the Prussians and Austrians took Mainz at the end of July, allowing the garrison to depart on condition of not serving against the Allies for a year. Then they invaded Alsace, but their mutual jealousy prevented them from going farther. Thus the summer passed away without any decisive achievement of the coalition. Meanwhile the Committee of Public Safety, inspired by Danton, strove to rebuild the French administrative system. In July the Committee was renewed and Danton fell out; but soon afterwards it was reinforced by two officers, Carnot, who undertook the organization of the army, and Prieur of the Cote d'Or, who undertook its equipment. Administrators of the first rank, these men renovated the warlike power of France, and enabled her to deal those crushing blows which broke up the coalition. The reign of terror. The Royalist and Girondin insurrections and the critical aspect of the war favoured the establishment of what is known as the reign of terror. Terrorism had prevailed more or less since the beginning of the Revolution, but it was the work of those who desired to rule, not of the nominal rulers. It had been lawless and rebellious. It ended by becoming legal and official. While Danton kept power Terrorism remained imperfect, for Danton, although unscrupulous, did not love cruelty and kept in view a return to normal government. But soon after Danton had ceased to be a member of the Committee of Public Safety Robespierre was elected, and now became the most powerful man in France. Robespierre was an acrid fanatic, and unlike Danton, who only cared to secure the practical results of the Revolution, he had a moral and religious ideal which he intended to force on the nation. All who rejected his ideal were corrupt; all who resented his ascendancy were traitors. The death of Marat, who was stabbed by Charlotte Corday (q.v.) to avenge the Girondins, gave yet another pretext for terrible measures of repression. In Paris the armed ruffians who had long preyed upon respectable citizens were organized as a revolutionary army, and other revolutionary armies were established in the provinces. Two new laws placed almost everybody at the mercy of the government. The Law of the Maximum, passed on the 17th of September, fixed the price of food and made it capital to ask for more.