But after he was persecuted by the Petions and Robespieres of the day, because of his moderation, loyalty and attachment to the constitution, he was held in high esteem by the friends of rational freedom, and still enjoyed the confidence both of Louis and of the National Assembly. Toward the close of the year 1791, by request of the King, he was appointed to command the army of the centre, to oppose the foreign troops then invading France. When he accepted the appointment, he assured the National Assembly of his "determination to support the constitution." The President replied, "the French nation, who have sworn to conquer and to live free, will always, with confidence, present to their foes and to tyrants, the constitution and Lafayette." As commander in chief of that department of the French army entreated to him, he was assiduous to maintain proper discipline and order; a matter of great difficulty, as a revolutionary spirit pervaded all ranks, and the soldiers were disposed to insubordination, especially under a leader not belonging to the popular party. He had several engagements with the enemy, in which he was successful. But his operations and those of the other generals, who commanded in other departments of the northern armies of France, were greatly impeded by the injudicious and variable plans of the assembly, then torn by factions, and disgraced by low intrigues. The evil spirit extended to the military; and each faction had its partizans among the soldiers. Lafayette saw and lamented this disastrous state of things; and he dared to oppose his single efforts to avert the impending ruin. It was at this time, that he wrote his celebrated letter to the National Assembly, of June 16, 1792, in which he exposed the violence and the cabals of the Jacobins, and conjured the moderates to cling to the constitution, as the only means of safety. This letter is so important, in developing the views and sentiments of Lafayette, and in detecting the causes of the excesses, which eventually disgraced the French revolution of that period, that it will be proper to record it in this connexion. He wrote to the King at the same time, expressing great anxiety for his safety, and declaring his wish to maintain the constitution. Lafayette's letter to the Legislative body. "_At the entrenched camp of Maubeuge_, 16_th June_, 1792. "GENTLEMEN,