Answer: He made christianity legal in the roman empire with the Edict of Milan in 313
The Act Prohibiting Importation of Slaves of 1807 (2 Stat. 426, enacted March 2, 1807) is a United States federal law that stated that no new slaves were permitted to be imported into the United States. It took effect in 1808, the earliest date permitted by the United States Constitution.
The reason why the spanish leaders wanted to push spanish control into North America during this time period was mostly because they wanted to gain more cotrol - which could be obviously achieved through more physical gain of the land of North America.
Your answer is freedom of rely