Where did the first major civil war battle with heavy casualties occur?

It was the Battle of Manassa (also known as the Battle of Bull Run)

Explanation:

That was the first major Civil War battle were heavy casualties occurred, since this took plase only mounths after the war began.

you aint got nothin on my lil weenies

thurgood marshall

explanation: in 1954, thurgood marshall and a team of naacp attorneys won brown v. board of education of topeka, kansas. in this landmark decision, the supreme court held that segregation in public education violated the equal protection clause of the fourteenth amendment.