Final answer:
Martin de Leon and Green DeWitt were empresarios known for bringing settlers to Texas, which played a crucial role in the settlement and subsequent history of Texas, including the Texas Revolution and the creation of the Republic of Texas.
Step-by-step explanation:
Martin de Leon and Green DeWitt are best known as empresarios who brought early settlers to Texas. An empresario was an individual who arranged for the settlement of land in exchange for grants of land. This system was used by Spain, and later by Mexico, to encourage the colonization and development of their territories. Martin de Leon founded the town of Victoria in Texas and brought in mainly Mexican settlers, while Green DeWitt established the town of Gonzales and his settlers were primarily Anglo-Americans.
The Long Expedition established a short-lived republic in Texas known as the Republic of Fredonia, which was not one of the more recognized names like the Lone Star Republic or the Republic of Texas.
Other key figures in the Texas Revolution and settlement included Stephen F. Austin, known as the "Father of Texas", who led the first 300 families into Texas, and empresarios played a significant part in the events that led to the Texas Revolution and eventually, the formation of the Republic of Texas.