WASHINGTON: Defense Secretary Robert Gates appealed Monday for calm amid intense administration debate over the flagging war in Afghanistan, asking for time and privacy for the president to come to a decision - an apparent message to the commanding US general there who has pressed publicly for more American troops.

US Marine radio operator and infantryman Lance Cpl. Walter Jennings of Normal, Ill. with Bravo Company, 1st Battalion 5th Marines walks in front of an armored vehicle, in Nawa district, Helmand province, southern Afghanistan, Monday, Oct. 5, 2009. [Agencies]

Gates' careful remarks appeared to stand as an implicit rebuke of the man he helped install as the top commander in Afghanistan, Gen. Stanley McChrystal, for his lobbying as President Barack Obama faced a critical week of decision over whether to escalate the Afghan war.

"It is important that we take our time to do all we can to get this right," Gates said at an Army conference. "In this process, it is imperative that all of us taking part in these deliberations - civilians and military alike - provide our best advice to the president candidly but privately."

Later, speaking alongside Secretary of State Hillary Rodham Clinton, Gates praised McChrystal and said no matter what Obama decides the general will execute it faithfully.

The fierce Taliban attack that killed eight American soldiers over the weekend added to the pressure. The assault overwhelmed a remote US outpost where American forces have been stretched thin in battling insurgents, underscoring the appeal from the top Afghanistan commander for as many as 40,000 additional forces - and at the same time reminding the nation of the costs of war.

Gates has not said whether he supports McChrystal's recommendation to expand the number of US forces by as much as nearly 60 percent. He is holding that request in his desk drawer while Obama sorts through competing recommendations and theories from some of his most trusted advisers.

"I believe that the decisions that the president will make for the next stage of the Afghanistan campaign will be among the most important of his presidency," Gates told the Army conference.

In trying to blunt the impression that the White House and military are at odds, Gates did not name names. But his remarks came days after McChrystal bluntly warned in London that Afghan insurgents are gathering strength. Any plan that falls short of stabilizing Afghanistan "is probably a shortsighted strategy," the general said, and he called openly for additional resources.

That prompted Obama's national security adviser, retired four-star Gen. James Jones, to say Sunday that military advice is best provided "up through the chain of command."