 Complete the following phrase:  On 5 April 1793, the French military commander and former minister of war General Charles François Dumouriez defected to Austria following the publication of an incendiary letter in which he threatened to march his army on the city of Paris if the National Convention did not accede to his leadership. News of his defection caused alarm in Paris, where imminent defeat by the Austrians and their allies was feared. A widespread belief held that revolutionary France was in immediate peril, threatened not only by foreign armies and by recent revolts in the 