Marie Antoinette doubted not that her cousin Francis would be as devoted to her interests as her brother Leopold had been. Fifteen days after the death of Leopold, Gustavus III. of Sweden was assassinated at a masked ball by the nobles of his court. His death momentarily embarrassed the movements of the emigrants, for he was actively engaged in raising an army for the invasion of France.[317] The allies were now vigorously raising troops and directing their march towards the frontiers of France. Some hoped that the demonstration would overawe the French and frighten them into submission. Others were eager, by prompt invasion, to submit the question to the arbitrament of battle. The Assembly speedily dispatched to the threatened frontier three armies of defense. Rochambeau was placed in command of the army of the north, at Flanders, consisting of 63,000 men; La Fayette was sent to the army of the centre, at Metz, which was 52,000 strong; Luckner occupied Alsace, with 48,000 troops.[318] In calling the Girondists into the ministry, General Dumouriez, a brave and veteran soldier, was appointed to the ministry of foreign affairs. With great vigor he prosecuted arrangements for the defense of France. In addition to the troops, amounting to 163,000, stationed along the northwestern frontier from Dunkirk to Besançon, he raised a fourth army to repel invasion from Spain through the passes of the Pyrenees. Dumouriez had acquired great popularity in the club of the Jacobins by frequenting their meetings, and by wearing the red cap of liberty, an emblem borrowed from the Phrygians. The queen was highly indignant that one in sympathy with the Jacobins should be called into the ministry, and, as she was now heartily in sympathy with the emigrants and the allies, she was provoked by the vigorous measures adopted to repel them. Dumouriez was a soldier, not a statesman; a man of heroic character, brave, impulsive, and generous. He had great power over the mind of the king; and the queen, anxious to see him, appointed an audience. In the memoirs of Dumouriez we find a narrative of this interview. Upon being ushered into her apartment, he found the queen, with flushed cheeks, rapidly pacing the floor, and giving every indication of extreme excitement. Dumouriez, embarrassed by this aspect of affairs, advanced in silence to a corner of the fire-place, when the queen turned toward him and abruptly said, with an air and tone of anger, "Sir, you are all-powerful at this moment, but it is through the favor of the people, who soon break their idols in pieces. Your existence depends upon your conduct. It is said that you possess great abilities. You must be aware that neither the king nor myself can endure these innovations, nor the Constitution. This I tell you frankly. Choose your side."