Manifest destiny was the belief that white settlers destiney from God was too move to the west and expand their country.
Cyrus' first great achievement was his conquest of Ecbatana, the Median capital ruled by Assuages. This event is first mentioned in two contemporary Babylonian sources: the Nabonidus Cylinder of Sippar and the Nabonidus Chronicle.
Im guessing they were called "wagon trains". Apologies if i'm incorrect!