What act by parliament forbade settlements west of the appalachian mountains

All of the following effects occurred as a result of roman expansion following the punic wars except it brought in great wealth from conquered territories it allowed many romans to buy large farming estates it provided slave labor for the large farming estates it caused the roman economy to decline due to the high cost of war

What were the 2 main elements as a result of the treaty?

Why did jefferson make the louisiana purchase?