All of the following were major events during the mexican revolution except: a. pancho villa was active in the north c. the u. s. invaded mexico city b. emiliano zapata was active in the south d. the u. s. occupied vera cruz

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;