Should be the establishment of the environmental protection agency
If US settlers decided to settle in Texas, they would be covered by the Mexican Colonization Law that stated that they could get large pieces of land cheaply, they would have tax cuts, and they would also have increased protection from the Mexican government.
Horses I think jdndhdhfjf
Most immigrants came from Ireland due to the potato famine.
Explanation:
One of the most devastating things to happen to Ireland was the potato famine where millions of people died of starvation in a famine tat was largely avoidable but the British did not do anything about it.
A huge stretch of the population thus decided to move away from the nation to settle for better prospects and the majority chose US.
The US thus became swarmed with migrants from Ireland on its shore that wanted sanctuary.
I looked it up and it seems that the best best answer would be RISE AND FALL OF DYNASTIES.
