That is true if the statement is kept local and specific.

They defeated that rally.

They defeated Cole’s attempt to intimidate their community publicly.

They drove the gathered Klansmen from the field.

They helped make future Klan organizing in Robeson County far less attractive.

They did not defeat the Ku Klux Klan everywhere.

Klan organizations remained active in North Carolina and throughout the United States.

White supremacist violence continued.

The distinction matters because exaggerating the victory can accidentally minimize the danger that remained.

A strong historical story does not need the Lumbee to destroy an entire national movement in one night.