The Goliad Campaign was the 1836 Mexican offensive to retake the Texas Gulf Coast during the Texas Revolution. Mexican troops under the command of General José de Urrea defeated rebellious immigrants to the Mexican province of Texas, known as Texians, in a series of clashes in February and March. When Mexico transitioned to a centralized government in 1835, supporters of federalism took up arms. Colonists in Texas, primarily immigrants from the United States, revolted in October 1835 and by the end of the year had expelled all Mexican troops from their province. With hostilities temporarily suspended, Frank W. Johnson and James Grant gathered volunteers for a planned invasion of the Mexican port town of Matamoros. James Fannin commanded troops stationed at Fort Defiance in Goliad. Unbeknownst to the Texians, on February 18 Urrea led a large contingent of troops from Matamoros into Texas to neutralize the rebels gathered along the coast. His troops easily defeated Johnson's small force at the Battle of San Patricio on February 26. Several days later, informants revealed Grant's location, and on the morning of March 2, 150 Mexican troops ambushed Grant's men at the Battle of Agua Dulce. The Mexican army then turned northward, headed towards Goliad. On March 12, they encountered a group of Texian soldiers, under the command of William Ward at Refugio. The Texians repulsed Mexican attacks for several days. On March 15, as their ammunition ran short, Texians retreated from Refugio. Many were killed or captured. Fannin ordered the bulk of his army to retreat from Goliad on March 19, in the hopes of joining the forces of General Sam Houston. That afternoon, Urrea's troops surrounded the Texians on an open prairie. The Battle of Coleto ended with a Texian surrender on March 20. Urrea marched the Texians back to Fort Defiance, where they were held under guard. One week later, under the orders of Mexican General Antonio López de Santa Anna, the Texians were marched outside the fort and shot. News of the Goliad Massacre spread outrage, resentment, and fear among the population of the fledgling Republic of Texas and abroad. Background Under President Antonio López de Santa Anna, the Mexican government began to shift away from a federalist model to a more centralized government. His increasingly dictatorial policies, including the revocation of the Constitution of 1824 in early 1835, incited federalists throughout the nation to revolt. The Mexican army