The difference in the principles underlying the policy of the rulers of Guatemala and Salvador, and the bitter animosity existing between them, brought about a war in 1850, in which Salvador, Honduras, and the democrats of Nicaragua were allied against Guatemala.[XIII-74] President Vasconcelos invaded Guatemala,[XIII-75] at the head of an allied force of Salvadorans, Hondurans, and Nicaraguans, but seems to have met with a signal defeat at the hands of an inferior force under Carrera, near Arada, in Chiquimula, on the 2d of February, which compelled a precipitate retreat into Salvadoran territory.[XIII-76] Carrera then marched across the line and established his headquarters in Santa Ana. This move demanded vigorous measures on the part of Salvador for self-defence.[XIII-77] Carrera wrote the government of Salvador February 22d, that, understanding it wished to make peace, but hesitated to propose it because of the presence of Guatemalan troops in Salvador, he would recross the line, starting on the next day.[XIII-78] Yet the war continued, until a definitive treaty of peace between Guatemala and Salvador was concluded at Guatemala on the 17th of August, 1853, and ratified by Guatemala on the 14th of September.[XIII-79] The civil strife raging in Guatemala led to differences with Honduras, whose government was accused of favoring the rebels of the mountain. Recriminations and border raids ensued, which culminated in a three years' war between the two countries, Guatemala aiding Guardiola and other enemies of Cabañas, the president of Honduras, in their attempts to overthrow the latter.[XIII-80] At last a treaty was concluded at Guatemala on the 13th of February, 1856, which the government of Guatemala ratified on the 5th of April.[XIII-81] * * * * * [Sidenote: REORGANIZATION OF GOVERNMENT.] The victorious aristocrats now saw their opportunity to reorganize the government under a system more in accordance with their ideas; that is to say, investing the executive with power to crush revolution. Paredes summoned the constituent assembly which had been called by Carrera's decree of May 24, 1848, and it was installed on the 16th of August, 1851. This body on the 19th of October adopted a new constitution under the title of Acta Constitutiva de la República de Guatemala, containing 18 articles.[XIII-82] Another decree regulated the election of representatives of the church and other corporations in the national congress.[XIII-83] [Sidenote: CARRERA REX.]