In a surprise move, Defense Secretary Leon Panetta removed the military ban on women in combat on Wednesday. Lifting the ban will open service on the front lines to thousands of women.

According to the Associated Press, the move was recommended by the Joint Chiefs of Staff and overturns a 1994 rule banning women from being assigned to smaller ground combat units. Smaller exemptions to the rule were passed in 2012, but the new decision opens up 238,000 positions where women were formerly banned.