The correct answer to this open question is the following.
Current scientific evidence suggests that people arrived in America when the Berin Strait was frozen, approximately 25,000 to 30, 000 years ago.
The Berin Strait is located in the Northern part of the North American continent and the Asian continent. Historians and anthropologists agree on the idea that in that time, the sea was frozen by the extremely cold temperatures and that is when people from Asia that were following animal herds to hunt and feed their families, crossed the Berin Strait from Russia to Alaska. Other scientists name this place as Beringia.
Vikings started war with romans and then vikings took over america and united states. then columbus came and defined it to be america and then united states of america after certain parts of america were named after different herritages and groups of hominids that claimed those lands.
The Knights of Labor were characterized by being a more radical group, they tended to be more extreme within its time period as well as who were included as members. From the year 1878 on. the Knights of Labor started to let in their group women and black people.
