My understanding of the history of TKD

Correct me where I’m wrong.

Korea is between Japan and China/around there.
Lotsa fighting between those two countries…
Korea adapted karate to their liking.
Thus evolved from that tang soo do/tae kwon do.
SO Tae kwon do is modified karate?

http://www.bullshido.net/forums/showthread.php?t=15052