Consider yourself a colonist that comes from the old world discovering a new land. Colonists generally have access to some advanced technology and kit they bring from the homeland (compared to where they have just settled). I see nothing wrong with what you did, as you have spent the time and effort to obtain those tech/items already where you came from.
Wrong timeline, but you are basically Columbus (or the old Norsemen who went to America before him) in America. They did not go there just to start from scratch and had fancy metal gear and all.