US Defence Secretary Leon Panetta will today formally announce an end to the military's ban on woman serving in units whose main job is to engage in combat, according to US officials.
It is a move that could open thousands of front-line role to female service members for the first time.
It follows the removal of another societal barrier in the US armed forces in 2011, when the Pentagon ended its "Don't Ask, Don't Tell" ban on gays and lesbians serving openly in the military.
More top news
A Nigerian bread seller has landed a modelling contract after walking by chance in to shot during a photoshoot for pop star Tinie Tempah.
Scientists are about to provide an update on the search for gravitational waves, 100 years after Albert Einstein predicted their existence.
The draft Investigatory Powers Bill - dubbed the "snooper’s charter" - requires "significant work", a committee of MPs and peers has said.