It protects all the rights not given to the federal government by the Constitution. Those rights and powers belong to the states or to the people.
The 10th amendment is: Rights of the States and the People
E. They were the first written federal constitution of the United States.
Anti-war marches and other protests, such as the ones organized by Students for a Democratic Society (SDS), attracted a widening base of support over the next three years, peaking in early 1968 after the successful Tet Offensive by North Vietnamese troops proved that war's end was nowhere in sight.