March 1: The Convention of 1836 of elected delegates convenes at Washington-on-the-Brazos. Thirty-two to sixty men from Gonzales of the "Gonzales Company of Mounted Volunteers" entered the Alamo at 1:00 a.m
March 2: Delegates adopt and sign The Texas Declaration of Independence and Texas Independence was declared. Delegates elect David G. Burnet interim president. Texans are defeated at the Battle of Agua Dulce.
March 3: James B. Bonham arrives back at the Alamo telling Travis that Fannin was not coming.
March 4: Delegates appoint Sam Houston commander of Texas forces. General Santa Anna holds a council of war with his generals Joaquín Ramírez y Sesma, Martín Perfecto de Cos, Manuel F. Castrillón and Colonels Juan Almonte, Agustín Amat, Francisco Duque and Manuel Romero to plan the final assault.
March 5: Mexican artillery ended their shelling of the Alamo and its defenses.
March 6: General Santa Anna orders storming of the Alamo. Battle of the Alamo: the Alamo falls. 180-250 defenders died but several civilians survived.
March 10: Houston abandoned Gonzales and retreated eastward to avoid the advancing Mexican army. Settlers started eastward with the army, beginning the Runaway Scrape.
March 12: The companies led by Lt. Col. William Ward and Amos King are attacked and captured by General Urrea at the Battle of Refugio.
March 19: General Urrea and his army defeated Colonel James Fannin's army near Goliad at the Battle of Coleto and Fannin surrenders his troops.
March 21: General Urrea and his men capture the Port of Copano.
March 27: By order of General Santa Anna, all of the Texan prisoners held at the Goliad Mission including James Fannin are executed. Less than thirty Texans managed to escape. Houston and his army arrive at San Felipe de Austin.
March 28: Houston orders Wiley Martin and Mosley Baker to guard his retreat thus delaying Santa Anna's crossing of the Brazos River.