WASHINGTON – Women in the military must have the same opportunities as men to take on grueling and dangerous combat jobs, whether loading 50-pound artillery shells or joining commando raids to take out terrorists, defense leaders declared Thursday as they ordered a quarter-million positions open to service members regardless of gender.

As Defense Secretary Leon Panetta and Gen. Martin Dempsey, chairman of the Joint Chiefs, signed an order wiping away generations of limits on women fighting for their country, the military services said they would begin a sweeping review of the physical requirements. At the same time they acknowledged that women have been fighting and dying in Iraq and Afghanistan for more than a decade.

Women make up about 14 percent of the 1.4 million active U.S. military personnel. More than 280,000 women have been sent to Iraq, Afghanistan or neighboring nations in support of the wars. Of the more than 6,600 U.S. service members who have been killed, 152 have been women.