Nisei (二世)
In Japanese, 1 = ichi (一), 2 = ni (二), 3 = san (三)
and so forth
The second generation Japanese Americans are considered "Nisei" because it literally means "second generation" in Japanese.
A) becasue thats when the us started to nationalize and move.
there are plenty.
if you are looking for something from way back, there was the tea act and it put taxes on tea and the colonists from Boston boarded british ships and dumped the tea into the ocean, otherwise known as the Boston tea party