Manuel Fernández Castrillón (1780s – April 21, 1836) was a major general in the Mexican army of the 19th century. He was a close friend of General and Mexican President Antonio López de Santa Anna. During the Texas Revolution, Castrillón advocated for mercy for captured Texian soldiers. He was killed at the Battle of San Jacinto, despite attempts by Republic of Texas Secretary of War Thomas Rusk to save his life. Early life Manuel Fernández Castrillón was born in either Cuba or Spain. Although he was originally a member of a Spanish force attempting to subdue the Mexican rebels during the Mexican War of Independence, Castrillón soon switched sides and served with the Mexican independence forces. He served under Mexican General Antonio Lopez de Santa Anna in an 1822 battle for Veracruz, and again later as Santa Anna worked to quell various rebellions. Texas Revolution During the Texas Revolution, Castrillón served as Santa Anna's aide-de-camp. Battle of the Alamo He joined Santa Anna on the 1836 invasion of Texas, which first journeyed to San Antonio de Bexar, and besieged the small Texan force garrisoned at the Alamo. Castrillón often argued against Santa Anna's decision to immediately assault the Alamo, advocating instead that the Mexican army wait for the arrival of the heavier cannon that would reduce the Alamo walls to rubble. On March 6, 1836, during the final assault of the Alamo, Castrillón took command of the Toluca Battalion after Colonel Francisco Duque was wounded. This column attacked the north wall of the Alamo. According to the diary of José Enrique de la Peña, after the Mexican victory at the Battle of the Alamo, Castrillón brought before Santa Anna six or seven Texians who he had taken prisoner during the final Alamo assault. Historian Edmondson speculates that these men may have been sick and unable to participate in the fighting; other historians have theorized that the prisoners may have included Davy Crockett, who Castrillón spared when the final small band of Texians was overwhelmed. Castrillón petitioned that their lives be spared. Santa Anna had stated that no prisoners would be taken and ordered the Texians executed on the spot. Weeks later, during the Goliad Massacre, Fernández Castrillón also protested – in vain – the execution of nearly 400 Texian prisoners, including their leader, James Fannin. After the Battle of the Alamo, the Mexican army moved east into the more settled