Explanation: On 6 March 1836, at the Battle of the Alamo, Santa Anna's forces killed 189 Texan insurgents and later executed more than 342 Texan prisoners, including James Fannin at the Goliad Massacre (27 March 1836). After that Texas declared its independence from Mexico (March 2). After his army had defeated Texan forces at the Alamo and Goliad, Santa Anna then moved eastward to the San Jacinto River, where he was defeated on April 21 in the Battle of San Jacinto and was captured by Gen.
They protected early civilization from most invaders, is the correct answer. The Himalayas have been shielding India from outside invaders since the early occasions.
