USA HISTORY

Detailed explanation-1: -Hostilities Commence. With the outbreak of hostilities at Rancho de Carricitos, both U.S. and Mexican armies accepted war had begun. Neither side waited for a formal declaration of war. General Mariano Arista began shuttling troops across the Rio Grande to besiege the isolated Fort Texas.

Detailed explanation-2: -The Rio Grande rises in the east Rio Grande National Forest in the U.S. state of Colorado. It is formed by the joining of several streams, just east of the continental divide. From there, it flows through the San Luis Valley, then south into New Mexico.

Detailed explanation-3: -The Civil War on the Rio Grande, 1846–1876 makes a groundbreaking contribution not only to the history of a Texas region in transition but also to the larger history of a nation at war with itself.

Detailed explanation-4: -Rio Grande, port city, southeastern Rio Grande do Sul estado (state), southern Brazil. The city lies along the Rio Grande (river), which is the outlet to the Atlantic Ocean of the Patos Lagoon. It is built on a low peninsula, barely 5 feet (1.5 metres) above sea level and 8 miles (13 km) from the river’s mouth.