"The fight is one that we will continue to wage alongside of you".
Individuals from the Middle East also featured prominently as guests of elected officials.
"As we work with our allies to destroy the remnants of ISIS, it is time to give our fearless warriors in Syria a warm welcome home", he added.
White House officials have pushed back, insisting the time has come for other nations to step up their contributions to the fight.
Asked about a recent CNN report detailing how U.S. supplied military equipment provided to Saudi Arabia and the UAE was winding up in the hands of local militias in Yemen, Votel said, "We have not authorized Saudi Arabia or the Emirates to re-transfer any of this equipment to other parties on the ground in Yemen".
In the Senate, however, the bill became a flash point for the congressional GOP's standoff with Trump after Senate Majority Leader Mitch McConnell (R-Ky.) offered last week an amendment effectively rebuking the president for announcing his intention to withdraw troops from Syria and Afghanistan. Trump recently insisted he wants to keep troops in neighbouring Iraq in order to "watch Iran".
By 2016, ISIS was on the defensive and the U.S. -led coalition supported Iraqi and Syrian partners' advance on Mosul and Raqqa, which would not fall until July 2017 and October 2017, respectively, months after Trump had taken over in the U.S. As a result, the Republican leader has often taken credit for successes against ISIS, which continued steadily through 2018.More news: Microsoft in bid to make Xbox Live worldwide cross-platform gaming backend
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"In this new era, local law enforcement and information sharing will be crucial, and our fight will not necessarily always be military-led", he said. Even though the U.S. and allies have won almost all the territory Islamic State had controlled, thousands of fighters remain dispersed in the region, intelligence officials have said.
"Nobody thought it was possible to do it this quickly", Trump told members of the global coalition to defeat the Islamic State group, who were meeting in Washington.
"My administration has acted decisively to confront the world's leading state sponsor of terror: the radical regime in Iran", he said. But he also pressed other nations to do more, saying they must take back and prosecute their fighters who have been captured in Syria and boost spending to help stabilise the country and clear landmines. "They have the ability of coming back together if we don't", General Joseph Votel, head of the United States military's Central Command, told a Senate Armed Services Committee hearing hours before the president's public address.
Appearing before the House Armed Services Committee for a hearing on the Pentagon's counter terrorism strategy, Assistant Secretary of Defense for Special Operations and Low-Intensity Conflict Owen West was asked point blank by Democrat Rep. Seth Moulton whether his former boss was wrong to oppose the President's decision.
Iraqi officials, as well, are asking for assistance.
Iraq's president hit back at Donald Trump Monday for saying United States troops should stay in Iraq to keep an eye on Iran, saying the U.S. leader did not ask for Iraq's permission to do so.
The amendment acknowledged progress against Daesh and al Qaeda in Syria and Afghanistan but warned that "a precipitous withdrawal" could destabilize the region and create a vacuum that could be filled by Iran or Russian Federation.
Among those gathered were foreign ministers from Turkey, France, Saudi Arabia, Jordan, Morocco and Iraq.