| FILE - This Jan. 19, 2013 file photo shows Defense Secretary Leon Panetta speaking during a news conference in London. Panetta has removed US military ban on women in combat, opening thousands of front line positions. | 
     WASHINGTON     
(AP) -- The Pentagon is lifting its ban on women serving in combat, 
opening hundreds of thousands of front-line positions and potentially 
elite commando jobs after generations of limits on their service, 
defense officials said Wednesday.
The changes,
 set to be announced Thursday by Defense Secretary Leon Panetta, will 
not happen overnight. The services must now develop plans for allowing 
women to seek the combat positions, a senior military official said. 
Some jobs may open as soon as this year, while assessments for others, 
such as special operations forces, including Navy SEALS and the Army's 
Delta Force, may take longer. The services will have until January 2016 
to make a case to that some positions should remain closed to women.
The
 groundbreaking move recommended by the Joint Chiefs of Staff overturns a
 1994 rule prohibiting women from being assigned to smaller ground 
combat units.
Officials briefed The Associated
 Press on the changes on condition of anonymity so they could speak 
ahead of the official announcement.
There long
 has been opposition to putting women in combat, based on questions of 
whether they have the necessary strength and stamina for certain jobs, 
or whether their presence might hurt unit cohesion.
But
 as news of Panetta's expected order got out, members of Congress, 
including the Senate Armed Services Committee chairman, Sen.  Carl 
Levin, D-Mich., announced their support.
"It reflects the reality of 21st century military operations," Levin said.
Sen.
 Jim Inhofe of Oklahoma, who will be the top Republican on the Armed 
Services panel, said, however, that he does not believe this will be a 
broad opening of combat roles for women because there are practical 
barriers that have to be overcome in order to protect the safety and 
privacy of all members of the military.
Panetta's
 move comes in his final weeks as Pentagon chief and just days after 
President Barack Obama's inaugural speech in which he spoke passionately
 about equal rights for all. The new order expands the department's 
action of nearly a year ago to open about 14,500 combat positions to 
women, nearly all of them in the Army. Panetta's decision could open 
more than 230,000 jobs, many in Army and Marine infantry units, to 
women.
In addition to questions of strength 
and performance, there also have been suggestions that the American 
public would not tolerate large numbers of women being killed in war.
Under
 the 1994 Pentagon policy, women were prohibited from being assigned to 
ground combat units below the brigade level. A brigade is roughly 3,500 
troops split into several battalions of about 800 soldiers each. 
Historically, brigades were based farther from the front lines and they 
often included top command and support staff.
The
 necessities of combat in Iraq and Afghanistan, however, propelled women
 into jobs as medics, military police and intelligence officers that 
were sometimes attached - but not formally assigned - to battalions. So 
while a woman couldn't be assigned as an infantryman in a battalion 
going out on patrol, she could fly the helicopter supporting the unit, 
or move in to provide medical aid if troops were injured.
And
 these conflicts, where battlefield lines are blurred and insurgents can
 lurk around every corner, have made it almost impossible to keep women 
clear of combat.
Still, as recent surveys and 
experiences have shown, it will not be an easy transition. When the 
Marine Corps sought women to go through its tough infantry course last 
year, two volunteered and both failed to complete the course. And there 
may not be a wide clamoring from women for the more intense, dangerous 
and difficult jobs - including some infantry and commando positions.
In the Navy, however, women have begun moving into the submarine force, with several officers already beginning to serve.
Jon
 Soltz, who served two Army tours in Iraq and is the chairman of the 
veterans group VoteVets.org, said it may be difficult for the military 
services to carve out exceptions to the new rule. And while he 
acknowledged that not all women are interested in pursuing some of the 
gritty combat jobs, "some of them are, and when you're looking for the 
best of the best you cast a wide net. There are women who can meet these
 standards, and they have a right to compete."
Two
 lawsuits were filed last year challenging the Pentagon's ban on women 
serving in combat, adding pressure on officials to overturn the policy. 
And the military services have been studying the issue and surveying 
their forces to determine how it may affect performance and morale.
The
 Joint Chiefs have been meeting regularly on the matter and they 
unanimously agreed to send the recommendation to Panetta earlier this 
month.
A senior military official familiar 
with the discussions said the chiefs concluded this was an opportunity 
to maximize women's service in the military. The official said the 
chiefs of the Army, Navy, Air Force and Marine Corps laid out three main
 principles to guide them as they move through the process:
- That they were obligated to maintain America's effective fighting force.
- That they would set up a process that would give all service members, men and women alike, the best chance to succeed.
-That they would preserve military readiness.
Part
 of the process, the official said, would allow time to get female 
service members in leadership and officer positions in some of the more 
difficult job classifications in order to help pave the way for female 
enlisted troops.
"Not every woman makes a good
 soldier, but not every man makes a good soldier. So women will 
compete," said Rep. Loretta Sanchez, D-Calif. "We're not asking that 
standards be lowered. We're saying that if they can be effective and 
they can be a good soldier or a good Marine in that particular 
operation, then give them a shot."
Women 
comprise about 14 percent of the 1.4 million active military personnel. 
More than 280,000 women have been sent to Iraq, Afghanistan or to jobs 
in neighboring nations in support of the wars. Of the more than 6,600 
who have been killed, 152 have been women.
The
 senior military official said the military chiefs must report back to 
Panetta with their initial implementation plans by May 15.
If
 the draft were ever reinstated, changing the rules would be a difficult
 proposition. The Supreme Court has ruled that because the Selective 
Service Act is aimed at creating a list of men who could be drafted for 
combat, American women aren't required to register upon turning 18 as 
all males are.
If combat jobs open to women, Congress would have to decide what to do about that law.