scheduled an assault for early on March 6. Many of his officers were against the plan; they preferred to wait until the artillery had further damaged the Alamo's walls and the defenders were forced to surrender. Santa Anna was convinced that a decisive victory would improve morale and sound a strong message to those still agitating in the interior and elsewhere in Texas. In the early hours of March 6, the Mexican army attacked the fort. Troops from Béxar were excused from the front lines, so that they would not be forced to fight their families and friends. In the initial moments of the assault the Mexican troops were at a disadvantage. Although their column formation allowed only the front rows of soldiers to fire safely, inexperienced recruits in the back also discharged their weapons; many Mexican soldiers were unintentionally killed by their own comrades. As Mexican soldiers swarmed over the walls, at least 80 Texians fled the Alamo and were cut down by Mexican cavalry. Within an hour, almost all of the Texian defenders, estimated at 182–257 men, were killed. Between four and seven Texians, possibly including Crockett, surrendered. Although General Manuel Fernández Castrillón attempted to intercede on their behalf, Santa Anna insisted that the prisoners be executed immediately. Most Alamo historians agree that 400–600 Mexicans were killed or wounded. This would represent about one-third of the Mexican soldiers involved in the final assault, which historian Timothy Todish remarks is "a tremendous casualty rate by any standards". The battle was militarily insignificant, but had an enormous political impact. Travis had succeeded in buying time for the Convention of 1836, scheduled for March 1, to meet. If Santa Anna had not paused in Béxar for two weeks, he would have reached San Felipe by March 2 and very likely would have captured the delegates or caused them to flee. The survivors, primarily women and children, were questioned by Santa Anna and then released. Susanna Dickinson was sent with Travis's slave Joe to Gonzales, where she lived, to spread the news of the Texian defeat. Santa Anna assumed that knowledge of the disparity in troop numbers and the fate of the Texian soldiers at the Alamo would quell the resistance, and that Texian soldiers would quickly leave the territory. Goliad Campaign Urrea reached Matamoros on January 31. A committed federalist himself, he soon convinced other federalists in the area that the