The president returned in July to San Salvador to quell a revolt. A few weeks later, on the 20th of July, 1838, the eleventh and last federal congress of Central America, presided over by Basilio Porras, closed its session.[VII-27] Subsequent efforts to bring it again into life proved unavailing, and from this time the dismemberment of the republic made rapid progress. Two days after the adjournment of congress, on the 22d, the state government of Guatemala was also dissolved, and was temporarily intrusted to the federal authorities,[VII-28] though the executive office finally was assumed by Mariano Rivera Paz, as president of the council, which satisfied the people, and peace was unbroken, it being understood that a constituent assembly would be summoned at once. [Sidenote: SALAZAR DEFEATS CARRERA.] As soon as Morazan was at some distance from Guatemala on his way to San Salvador, Carrera, the supposed beaten rebel leader, for whose capture a liberal reward had been offered,[VII-29] began to show signs of rallying. He gathered a numerous force, with which, about the middle of August, he defeated the federal troops, first at Jalapa and next at Petapa. He then, unresisted, took possession of La Antigua, a portion of which was pillaged, and forthwith started on his march for Guatemala.[VII-30] A general clamor for Morazan was aroused; but it was impossible for him to reach Guatemala in time, and the danger was imminent that Carrera would not only take the city, but also carry out his threats of burning every house in it. In this emergency, General Cárlos Salazar, with the garrison of 900 men, sallied forth, and aided by a thick fog, surprised Carrera at Villanueva, where the latter was concentrating his forces, now about 2,400 strong, with the plunder secured at La Antigua. A battle ensued, the bloodiest that occurred in 1837 or 1838, and Carrera was routed,[VII-31] with the loss of 350 killed and 24 prisoners, one of whom was the notorious Father Duran, the representative and agent of the aristocrats near the person of Carrera;[VII-32] besides giving up a number of federal prisoners and losing three pieces of artillery, 305 muskets, and a large number of other arms, besides ammunition. A portion of the defeated forces fled to La Antigua, and a smaller one joined the rebel Mangandí, who had 500 men. The latter, being ignorant of Carrera's mishap, approached Guatemala on the 11th, at 10 o'clock in the morning, causing no little commotion; but on learning of his leader's defeat, he retired to the mountains. The war might have ended here had the victors followed up their success; but petty annoyances prevented Salazar from doing so, and he threw up his command in disgust,[VII-33] though he was afterward induced to resume it.