“Mudbound” director Dee Rees will helm “An Uncivil War,” which will chronicle the battle to ratify the Equal Rights Amendment in the 1970s.

FilmNation Entertainment said Tuesday that casting on the film is underway with the aim of shooting in the first quarter of 2018.

The movie will focus on efforts by feminist activist and journalist Gloria Steinem, lawyer and activist Florynce Kennedy, and others to ratify the ERA, while conservative organizer Phyllis Schlafly advocates against it. The ERA was written to guarantee equal rights for all citizens regardless of sex, and although it passed both houses of Congress in 1972 and was submitted to the state legislatures for ratification, it fell short of enactment after receiving 35 of the necessary 38 state ratifications.

Rees has adapted David Kukoff’s script. FilmNation Entertainment is fully financing “An Uncivil War” and is producing the film alongside Peter Heller. FilmNation VP of development Ashley Fox will oversee on behalf of the company.

“I’m particularly interested in digging into the messiness of the women’s movement — the many different alliances that were formed and fractured and exploring who got left behind versus who got remembered,” Rees said. “The richness and texture of this story lie in the complicated bargains struck and broken in the imperfect, stuttering trajectory toward equality. Thrilled that FilmNation let me put my own spin on the script and I’m going to have a lot of fun putting together another amazing ensemble cast to ignite it.”

“Mudbound,” a period drama set in rural Mississippi during World War II, will hit Netflix on Nov. 17.

Rees is represented by WME, Victoria Cook at Frankfurt, and Kurnit, Klein & Selz. Kukoff is repped by ESArtists. The news was first reported by Deadline Hollyood.