Hello all! I hope this question is appropriate to this space. I'm writing a literary piece on three landmarks in American history and have come as far as my layman research will get me. I was hoping for some further insight and some source recommendations for three specific times and events:

One, the relationship between immigrants and the original population around Plymouth. As far as I understand, a recent plague (caused by other European immigrants) had wiped out a village that the newcomers settled into. I've also come to understand that the very religious settlers saw it as an act of God that the population of the new world was wiped out so they could take their place. Is there any more information on this place and time? How did people live? Were the living conditions roughly the same in the old and the new settlements? Were relations cordial? Was there trade? Charity? Did one, so to speak, attend each other's parties? How far away from each other were the settlements? Would it be fair to call them villages? Does one know if the architecture was similar in original vs. immigrant villages?

Two, the Compromise of 1877. In 1877 in Wormely’s Hotel, elected president Rutherford B. Hayes met up with industrialists and politicians and negotiated the withdrawal of all troops and all northern intervention from the Southern states, resulting in the first of a long line of violent and terrible backlashes for the black American population in the South. Hayes, an outspoken humanist and advocate of black rights and a good friend of the black owner of Wormely's hotel, James Wormely, kept his gentleman’s agreement to withdraw all federal military intervention from the South, in spite of 2000 (known) murders and lynchings between the end of the Civil War and 1877. Needless to say, the other end of the bargain was not kept. Another 4000 lives would be taken in the next few years. Who was in this room? What were their relationships? What would have been the core themes of the discussions? What was Hayes' relationship with James Wormely? Did Hayes ever express regret or remorse over this bargain? What was the public reaction? Any telling cartoons from the era?

Three, the scrapping of the interest cap in South Dakota in 1978. In 1978, Governor Bill Janklow of South Dakota singlehandedly in one afternoon scrapped the interest cap in South Dakota. Soon after, the banks moved in. Bill Janklow's chief-of-staff left to become president and CEO of Citibank South Dakota. Citibank committed to expanding its workforce in Sioux Falls and recruiting locals for its financial-management training programs. Is it known how this deal took place? Are there records of meetings between Janklow, his chief of staff, and Citibank? Who was this chief of staff anyway? And on a side note, why was Janklow never charged with the murders of Jancita Eagle Deer and Delphine Eagle Deer?

I hope this is not too out of format! Thankful for any expansions or directions to further sources!