a.
After General Cos surrendered during the Texas Revolution, Mexico ignored the legislative act setting the southwestern boundary of Texas at the Rio Grande .
b.
In 1850 Washington D.C. abolished slavery.
c.
After the U.S. Mexican war, Mexico ceded the upper portion of California and parts of New Mexico to the U.S. for $15 million.
d.
There was strong opposition to the war with Mexico within the U.S. from the Whig party
