never never never.
Japan ruled it until the end of WW2. After that ww2 China tool control of the country. The civil war in China caused the nationalist to flee to Taiwan As its last stronghold. It was never a US province, territory or anything. It has always been a friend since ww2. Red China on the other hand fought us to a bloody standstill in Korea 50 years ago.
http://en.wikipedia.org/wiki/History_of_Taiwan#Japanese_Rule