The Tornel Decree
This document from the Texas Revolution that helped shape its course was known as The Tornel Decree. The "no quarter" policy described in it explains the routine executions of Texian prisoners that is a hallmark of the war.
WAR AND NAVY DEPARTMENT
Circular. The government has received information that, in the United States of North America, meetings are being called for the avowed purpose of getting up and fitting out expeditions against the Republic of Mexico, in order to send assistance to the rebels, foster the civil war, and inflict upon our country all the calamities, by which it is followed. In the United States, our ancient ally, expeditions are now organized similar to that headed by the traitor Jose Antonio Mexia and some have even set out for Texas. They have been furnished with every kind of ammunition, by means of which the revolted colonies are enabled to resist and fight the nation from which they received but immense benefits. The government is also positively informed that these acts, condemned by the wisdom of the laws of the United States, are also reported by the general government, with which the best intelligence and greatest harmony still prevail. However, as these adventurers and speculators have succeeded in escaping the penalties inflicted by the laws of their own country, it becomes necessary to adopt measures for their punishment. His excellency the president ad interim, anxious to repress these aggressions which constitute not only an offense to the sovereignty of the Mexican nation, but also to evident violation of international laws as they are generally adopted, has ordered the following decrees to be enforced.
I send to you these decrees, that you may cause them to be fully executed. TORNEL.
Mexico 30th Dec. 1835
Source: Telegraph and Texas Register.