The war between France and Austria opened in April, 1792, on the Flemish frontier. The first encounters were discreditable to the French soldiery, who took to flight and murdered one of their generals. The discouragement with which the nation heard of these reverses deepened into sullen indignation against the Court, as weeks and months passed by, and the forces lay idle on the frontier or met the enemy only in trifling skirmishes which left both sides where they were before. If at this crisis of the Revolution, with all the patriotism, all the bravery, all the military genius of France burning for service, the Government conducted the war with results scarcely distinguishable from those of a parade, the suggestion of treason on the part of the Court was only too likely to be entertained. The internal difficulties of the country were increasing. The Assembly had determined to banish from France the priests who rejected the new ecclesiastical system, and the King had placed his veto upon their decree. He had refused to permit the formation of a camp of volunteers in the neighbourhood of Paris. He had dismissed the popular Ministry forced upon him by the Gironde. A tumult on the 20th of June, in which the mob forced their way into the Tuileries, showed the nature of the attack impending upon the monarchy if Louis continued to oppose himself to the demands of the nation; but the lesson was lost upon the King. Louis was as little able to nerve himself for an armed conflict with the populace as to reconcile his conscience to the Ecclesiastical Decrees, and he surrendered himself to a pious inertia at a moment when the alarm of foreign invasion doubled revolutionary passion all over France. Prussia, in pursuance of a treaty made in February, united its forces to those of Austria. Forty thousand Prussian troops, under the Duke of Brunswick, the best of Frederick's surviving generals, advanced along the Moselle. From Belgium and the upper Rhine two Austrian armies converged upon the line of invasion; and the emigrant nobles were given their place among the forces of the Allies.