According to the timeline of the nonviolent civil rights movement, what was the earliest event in the movement's work during the '50s and '60s?

Question

Quizplus · Accepted Answer

The Brown v. Board of Education ruling in 1954 was a landmark Supreme Court decision that declared segregation in public schools unconstitutional, and it was the earliest event in the nonviolent civil rights movement's work during the '50s and '60s.

According to the Timeline of the Nonviolent Civil Rights Movement