It is true I did that one
Mexican immigrants is your answer.
Midwestern farmers traveling to Southwest America would be entering into Mexico (before the Mexican-American War), which included present-day Texas stretching to present-day California.
hope this helps
The dynasty that restored unity to China after Shi Huangdi's government crumbled was the Zhou Dynasty
Provided land as long as worked the land 10 years or so and then the land is yours
By taking them to the north to freedom and possibly to Canada where slavery was illegal
