With the annexation of Texas within the United States and the Mexican–American War in 1846, several companies of Rangers were mustered into federal service and proved themselves at the battles of Palo Alto and Resaca de la Palma. From that moment on, their effectiveness as guerrilla fighters and guides to the federal army through a territory that they were familiar with marked the pace of the American offensive. Rangers played an important role in the battles of Monterrey and Buena Vista. The army, commanded by General Winfield Scott, landed at Veracruz in March 1847, and the Rangers once again provided valuable support at the ensuing Siege of Veracruz and the battles of Cerro Gordo and Chapultepec. They were also responsible for the defeat of the fierce Mexican "guerrilleros" that hindered the advance of the federal troops, which they achieved ruthlessly and efficiently. By then, the Rangers had earned themselves a considerable reputation that approached the legendary among Mexicans, and when Ranger companies entered and occupied Mexico City with the U.S. Army in September 1847, "los Diablos Tejanos" (the "Texas Devils") were received with reverence and fear. Their role in the Mexican–American War also won them nationwide fame in the United States and news of their exploits, in the contemporary press became common, effectively establishing the Rangers as part of American folklore. As the "Victoria Advocate" reported in the November 16, 1848, issue: