How did the fifteenth amendment and the 1960s civil rights laws extend voting rights to more americans? summarize what you have learned in three to four full sentences.

The Fifteenth Amendment was the initial move in awarding complete voting rights to African Americans. But, Jim Crow laws generated more constraints on these rights. With the passage of the Voting Rights Act, the Fifteenth Amendment was implemented as voting constraints were lifted.

The Fifteenth Amendment:

The Fifteenth Amendment to the United States Constitution forbids the central and state jurisdictions from rejecting a voter the right to vote based on that citizen's "race, color, or former position of subjection".

they united the colonies in their fight against the british.