Manifest destiny was the belief that white settlers destiney from God was too move to the west and expand their country.
Because they were too lazy to be working at a factory
By then I would say either the British or Dutch. More so the Dutch because New York was originally founded by the Dutch and was originally named "New Amsterdam" after the capital of by the time (I believe) to be Holland, modern-day Netherlands. Otherwise the British flooded New England, after all, it is called New...England so...
In the year 1803, the United States of America purchased the approximately 828 million square miles of territory from France, doubling its territory. Because of Thomas Jefferson's purchase of the Louisiana territory, 15 states were added in the territory of America. It stretched from the Canadian border in the north to the Gulf of Mexico in the south and from the Rocky Mountains in the west to the Mississippi River in the East.
Island Hopping
Island hopping or leap frogging was the military strategy used by the Allies in the Pacific War against Japan and by the Axis powers in WWII