After the Brown v. Board of education of Topeka ruling, what do u think was the most significant event of the civil rights movement prior to 1960? Why?

Crisis at Little Rock, because it coerced the authority to act or the Montgomery bus boycott, this brought Martin Luther King Jr., into a leadership.

Explanation:

The Montgomery boycott bus, in 1955 National Association for the Advancement of Colored People officer Rosa Parks imprisoned for not giving up their seat on a bus because she was a Black lady. Montgomery Improvement Association was formed and then they organized a bus boycott campaign against segregation on public buses and later elect 26-year-old Martin Luther King jr. as their leader.

to contain the wave of communism

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.