The first people to invade North America were the distant ancestors of the people we now call Native Americans.
Then around 1000AD the Vikings founded a few settlements, but that cannot be considered an invasion, since the settlements had little known impact on the earlier residents, ad did not last long in any case.
Then following the 1492 voyage of Christopher Columbus, Europeans began coming the North America, among other places in the Western Hemisphere, in great numbers and stayed permanent, displacing nearly all the previous residents.
no
Vikings
who offered no harbors for invaders from the sea?
NVA (North Vietnamese Army).
The Mycenaean Civilization
The north marshes
The Aryans were the invaders from the north who are believed to have conquered the Dravidians in the Indian subcontinent around 1500 BC. This period marked the beginning of the Vedic period in India.
i dont know
himilayan mountains
The only invaders from (Red) China were in the Korean War (1950-1953) when they crossed into North Korea across the Yalu River.
These are the Ten Lost Tribes.
Highway of Ancient Invaders