Saul Loeb, AFP | US President Donald Trump and First Lady Melania Trump greet members of the US military during an unannounced trip to Al Asad Air Base in Iraq on December 26, 2018.

President Donald Trump used a lightning visit to Iraq -- his first with US troops in a conflict zone since being elected -- to defend the withdrawal from Syria and to declare an end to America's role as the global "policeman."

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Trump landed at 7:16 pm local time at Al-Asad Air Base in western Iraq, accompanied by his wife Melania, following what he described as a stressful, secrecy shrouded flight on a "pitch black" Air Force One.

The president spoke to a group of about 100 mostly special forces personnel and separately with military leaders before leaving a few hours later. A planned meeting with Iraqi Prime Minister Adel Abdel Mahdi was scrapped and replaced by a phone call, the premier's office said.

During the call, Trump invited Abdel Mahdi to visit Washington and he accepted, White House spokeswoman Sarah Sanders said.

White House video showed a smiling Trump shaking hands with camouflage-clad personnel, signing autographs and posing for photos at the base in Iraq.

Morale-boosting presidential visits to US troops in war zones have been a longstanding tradition in the years following the September 11, 2001 terrorist attacks.

.@FLOTUS Melania and I were honored to visit our incredible troops at Al Asad Air Base in Iraq. GOD BLESS THE U.S.A.! pic.twitter.com/rDlhITDvm1 Donald J. Trump (@realDonaldTrump) December 26, 2018

Trump has taken considerable criticism for declining to visit in the first two years of his presidency. But speculation had been mounting that he would finally make the gesture following his controversial plan to slash troop levels in Afghanistan and his order to withdraw entirely from Syria.

At the Iraqi military base, Trump sought to defend his "America First" policy of pulling back from multinational alliances, including what to many Americans seem like the endless wars of the Middle East.

"It's not fair when the burden is all on us," he said. "We don't want to be taken advantage of any more by countries that use us and use our incredible military to protect them. They don't pay for it and they're going to have to."

"We are spread out all over the world. We are in countries most people haven't even heard about. Frankly, it's ridiculous," he added.

Trump told reporters he had overruled generals asking to extend the Syria deployment, where about 2,000 US forces, joined by other foreign troops, assist local fighters battling the Islamic State jihadist group.

"You can't have any more time. You've had enough time," he said he told the top brass.

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Disentangling America

The drawdowns -- and the abrupt way that they were announced -- helped lead to the resignation of Trump's defense secretary, Jim Mattis, who has been one of the administration's heavyweights.

In his forcefully-worded resignation letter, Mattis appeared to chide Trump when he stressed his own "strongly held" views on "treating allies with respect and also being clear-eyed about both malign actors and strategic competitors."

Trump has also taken criticism from France and other foreign partners as well as senior figures in his own Republican party.

However, the president has made disentangling America from its wars a priority since his 2016 election and he said in Iraq that the US would no longer be treated as "suckers."

The Islamic State group, which once controlled swaths of territory in Iraq and Syria, has been driven mostly into hiding.

Trump tells troops 'great job' with Islamic State group

On Wednesday, Trump said "we've knocked them out," although he appeared to hedge his bets -- following widespread criticism that his victory declaration is premature -- when he added that Iraq might be used as a future base "if we wanted to do something in Syria."

According to a transcript released by the White House, he thanked troops for the "near-elimination" of IS and said "we'll be watching... very, very closely -- the remnants" of the group.

Trump said in Iraq that some of the US troops from Syria "will come here for a stay, but a lot of them are going to be going back home," the transcript said.

While highlighting the military and financial roles he said Turkey and Saudi Arabia had agreed to play in Syria, Trump also told journalists that "we may go back and help."

In Afghanistan, Trump wants to withdraw about half of the 14,000 soldiers locked in a war against Taliban guerrillas that has long resembled a stalemate.

The Iraq trip provides some distraction from a rising tide of domestic political problems, including the government shutdown caused by Trump's row with Congress over funding for a US-Mexico border wall.

Pressure is also mounting from a series of criminal probes into Trump's finances and links to Russia.

According to Trump, the flight into Iraq was unlike anything he'd previously experienced.

"If you would have seen what we had to go through in the darkened plane with all windows closed with no light anywhere -- pitch black," he said.

After departing Iraq, Trump stopped over at Ramstein Air Base in Germany, where he and Melania shook hands and greeted some of the hundreds of troops gathered in a hangar.

The president and his entourage then headed back to the United States.

(AFP)

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