Which action did lonnie smith take to advance the cause of civil rights for african americans in texas

He is known for The Smith v. Allwright case that brought victory for African Americans in Texas primary voting

Explanation:

Lonnie smith was a dentist in Texas and is known for his case against Allwright that cancelled all white primaries in Texas. It was when Lonnie Smith went to vote for the Democratic primaries and was denied vote by the all-whites-primaries which had disenfranchised thousands of black people in Texas at the time, that NAACP Legal Defense Fund took up the case, filling a suit against the preccint election judge, AllWright based on 14th and 15th Amendment rights. NAACP won in Supreme Court appeal after failing in federal court ruling.

each played a major role in ending the cold war.