Howcan you use longitude and latitude to determine a location?

Use the latitude is at the top of the map or glide and then longitude goes across, latitude goes first so late the numbers on latitude and longitude and line them up. they should come to a point... sorry i’m horrible at explaining

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years