Which of the following statements is FALSE? a. The U. S. declared war on Mexico on May 13, 1846.
b. Mexico declared a defensive war against the U. S. on April 23, 1846.
C. Both U. S. and Mexican forces sent troops to the region between the Rio Grande and the Nueces
River.
d. Negotiations by Louisiana Senator John Slidell put a temporary halt to U. S.-Mexican tensions
and hostilities.

What policy did "jim crow" laws put in place? black codes integration segregation 2. the supreme court case that established the doctrine of "separate but equal" was dred scott v. sandford plessy v. ferguson brown v. board of education 3. the supreme court case that overturned the doctrine of "separate but equal" wasdred scott v. sandford plessy v. ferguson brown v. board of education