Brown v. Board of Education (1954). The case ruled that segregated public schools were unconstitutional on the grounds that "separate could never be equal." The case overturned Plessy v. Ferguson, a landmark and deeply racist Supreme Court decision from 1896 that had allowed segregated education.
Most soldiers started to use gas bombs
The Tang dynasty fostered the most advanced trade network of the four.
D foccus on helping underdevoloped countries
