Amelia Boynton Robinson, a civil rights activist and organizer who helped secure the passage of the 1965 Voting Rights Act, died Wednesday. She was 104.

On March 7, 1965, Boynton Robinson, along with Hosea Williams, James Bevel, and John Lewis, led 600 protestors across the Edmund Pettus Bridge in Selma, Montgomery before being attacked by a mob of officers. The day became known as Bloody Sunday, and was the first of three historic marches that helped put an end to voting rights suppression for blacks across the country.

Boynton Robinson—who was born in Savannah, Georgia in 1911 and devoted her life’s work to civil rights—co-founded the Dallas County Voters League in 1933 and later became the first black woman to run for Congress in Alabama in 1964.

In July, Boynton Robison suffered the first of several strokes and was hospitalized as a result. The Los Angeles Times reports she was “surrounded by relatives and friends” before passing early Wednesday morning, around 2:20 a.m.

“I have been called rabble-rouser, agitator,” Boynton Robinson said in 1992. “But because of my fighting, I was able to hand to the entire country the right for people to vote.”

[Image via AP]