Mattis, in response, told the Senate Armed Services Committee that he will provide details on the new strategy for the war in mid-July.
In testimony before a Senate panel, Mattis said he had received the authority from President Donald Trump to set US troop levels in Afghanistan, which will allow him to more effectively manage the war effort.
"I would say that the reason we have not been attacked over many years from where the 9/11 attack originated is heavily due to the sacrifices that we have made over years as we have kept the enemy on the back foot", Mattis said.
"I believe that we pulled out forces at a time, as you know, when the violence was lower, but we pulled them out on a timeline rather than consistent with the maturation of the government and the security forces", Mattis said.
Nintendo Announces Metroid Prime 4
After a almost 10-year hiatus, Metroid Prime 4 will finally be arriving on the latest Nintendo console. Metroid fans are going to be ecstatic to hear that Metroid Prime 4 was officially revealed.
"It's going to be an era of frequent skirmishing and it's going to require a change in our approach from the last several years if we're to get it to that position", Mr Mattis said.
"I don't have anything I can comment on that right now".
Earlier, Mattis told lawmakers that he would present Trump with a new USA military strategy for Afghanistan by mid-July. And two U.S. Army Rangers died in a April 27 raid on an IS compound in eastern Afghanistan. The State Department and U.S. Agency for International Development could theoretically help round out such a strategy, but they are intentionally understaffed at present and not under the Pentagon's authority in the first place.
Cavs end Warriors perfect postseason run in Game 4
That opened the door for what was a fantastic closing stretch, giving the Warriors 118-113 win and a 3-0 lead in the series. The 7-footer finished 10 of 18 from the field with eight rebounds and four assists.
Earlier this year, the Pentagon was considering a request for roughly 3,000 more troops, mainly for noncombat duties such as training and advising.
The Taliban controls more territory in Afghanistan than at any point after the 2001 USA -led intervention that toppled the Taliban government, which harbored al Qaeda, the architects of 9/11 terror attacks. That decision, however, has been stalled by the broader administration review of Afghan policy and a push for North Atlantic Treaty Organisation to contribute more troops. The increased fight has led to a recent string of American deaths. Mattis said there is a role for the State Department in putting diplomatic and economic pressure on these countries. "It's hard for them to conduct external operations out of that former stronghold when they are just trying to hang onto their own lives and avoid us". Throughout his administration and that of his predecessor, Obama's White House closely controlled US troop levels in Afghanistan.
"It is not", Dunford said.
What happened in Bill Cosby's sexual-assault trial
Cosby, who has said he does not plan to testify, repeatedly lowered and shook his head as she spoke. Gianna Constand told the jury that she was distraught to learn what Cosby had done to her daughter.